diff --git a/lib/Model/AbstractAccountUpdate.php b/lib/Model/AbstractAccountUpdate.php
index 6147f0d..e50003b 100644
--- a/lib/Model/AbstractAccountUpdate.php
+++ b/lib/Model/AbstractAccountUpdate.php
@@ -113,7 +113,7 @@ class AbstractAccountUpdate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['last_modified_date'] = isset($data['last_modified_date']) ? $data['last_modified_date'] : null;
diff --git a/lib/Model/AbstractApplicationUserUpdate.php b/lib/Model/AbstractApplicationUserUpdate.php
index d253124..befaba4 100644
--- a/lib/Model/AbstractApplicationUserUpdate.php
+++ b/lib/Model/AbstractApplicationUserUpdate.php
@@ -33,7 +33,7 @@
  */
 class AbstractApplicationUserUpdate implements ModelInterface, ArrayAccess
 {
-    const DISCRIMINATOR = null;
+    const DISCRIMINATOR = [];
 
     /**
       * The original name of the model.
@@ -113,7 +113,7 @@ class AbstractApplicationUserUpdate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
diff --git a/lib/Model/AbstractCustomerActive.php b/lib/Model/AbstractCustomerActive.php
index abde958..90d0666 100644
--- a/lib/Model/AbstractCustomerActive.php
+++ b/lib/Model/AbstractCustomerActive.php
@@ -33,7 +33,7 @@
  */
 class AbstractCustomerActive implements ModelInterface, ArrayAccess
 {
-    const DISCRIMINATOR = null;
+    const DISCRIMINATOR = [];
 
     /**
       * The original name of the model.
@@ -133,7 +133,7 @@ class AbstractCustomerActive implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['customer_id'] = isset($data['customer_id']) ? $data['customer_id'] : null;
diff --git a/lib/Model/AbstractCustomerAddressActive.php b/lib/Model/AbstractCustomerAddressActive.php
index 2c417f4..0d8be2a 100644
--- a/lib/Model/AbstractCustomerAddressActive.php
+++ b/lib/Model/AbstractCustomerAddressActive.php
@@ -33,7 +33,7 @@
  */
 class AbstractCustomerAddressActive implements ModelInterface, ArrayAccess
 {
-    const DISCRIMINATOR = null;
+    const DISCRIMINATOR = [];
 
     /**
       * The original name of the model.
@@ -108,7 +108,7 @@ class AbstractCustomerAddressActive implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['address'] = isset($data['address']) ? $data['address'] : null;
diff --git a/lib/Model/AbstractCustomerCommentActive.php b/lib/Model/AbstractCustomerCommentActive.php
index 80be123..d49270e 100644
--- a/lib/Model/AbstractCustomerCommentActive.php
+++ b/lib/Model/AbstractCustomerCommentActive.php
@@ -33,7 +33,7 @@
  */
 class AbstractCustomerCommentActive implements ModelInterface, ArrayAccess
 {
-    const DISCRIMINATOR = null;
+    const DISCRIMINATOR = [];
 
     /**
       * The original name of the model.
@@ -103,7 +103,7 @@ class AbstractCustomerCommentActive implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['content'] = isset($data['content']) ? $data['content'] : null;
diff --git a/lib/Model/AbstractHumanUserUpdate.php b/lib/Model/AbstractHumanUserUpdate.php
index ce39f8d..63df125 100644
--- a/lib/Model/AbstractHumanUserUpdate.php
+++ b/lib/Model/AbstractHumanUserUpdate.php
@@ -33,7 +33,7 @@
  */
 class AbstractHumanUserUpdate implements ModelInterface, ArrayAccess
 {
-    const DISCRIMINATOR = null;
+    const DISCRIMINATOR = [];
 
     /**
       * The original name of the model.
@@ -138,7 +138,7 @@ class AbstractHumanUserUpdate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['email_address'] = isset($data['email_address']) ? $data['email_address'] : null;
diff --git a/lib/Model/AbstractPaymentLinkUpdate.php b/lib/Model/AbstractPaymentLinkUpdate.php
index 6af143d..bdffd21 100644
--- a/lib/Model/AbstractPaymentLinkUpdate.php
+++ b/lib/Model/AbstractPaymentLinkUpdate.php
@@ -33,7 +33,7 @@
  */
 class AbstractPaymentLinkUpdate implements ModelInterface, ArrayAccess
 {
-    const DISCRIMINATOR = null;
+    const DISCRIMINATOR = [];
 
     /**
       * The original name of the model.
@@ -153,7 +153,7 @@ class AbstractPaymentLinkUpdate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['allowed_payment_method_configurations'] = isset($data['allowed_payment_method_configurations']) ? $data['allowed_payment_method_configurations'] : null;
diff --git a/lib/Model/AbstractRefundCommentActive.php b/lib/Model/AbstractRefundCommentActive.php
index d454e0c..349a1a0 100644
--- a/lib/Model/AbstractRefundCommentActive.php
+++ b/lib/Model/AbstractRefundCommentActive.php
@@ -33,7 +33,7 @@
  */
 class AbstractRefundCommentActive implements ModelInterface, ArrayAccess
 {
-    const DISCRIMINATOR = null;
+    const DISCRIMINATOR = [];
 
     /**
       * The original name of the model.
@@ -103,7 +103,7 @@ class AbstractRefundCommentActive implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['content'] = isset($data['content']) ? $data['content'] : null;
diff --git a/lib/Model/AbstractShopifySubscriptionProductUpdate.php b/lib/Model/AbstractShopifySubscriptionProductUpdate.php
index 62f728a..cba9c71 100644
--- a/lib/Model/AbstractShopifySubscriptionProductUpdate.php
+++ b/lib/Model/AbstractShopifySubscriptionProductUpdate.php
@@ -33,7 +33,7 @@
  */
 class AbstractShopifySubscriptionProductUpdate implements ModelInterface, ArrayAccess
 {
-    const DISCRIMINATOR = null;
+    const DISCRIMINATOR = [];
 
     /**
       * The original name of the model.
@@ -168,7 +168,7 @@ class AbstractShopifySubscriptionProductUpdate implements ModelInterface, ArrayA
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['absolute_price_adjustment'] = isset($data['absolute_price_adjustment']) ? $data['absolute_price_adjustment'] : null;
diff --git a/lib/Model/AbstractSpaceUpdate.php b/lib/Model/AbstractSpaceUpdate.php
index 29c62d4..beb90c3 100644
--- a/lib/Model/AbstractSpaceUpdate.php
+++ b/lib/Model/AbstractSpaceUpdate.php
@@ -33,7 +33,7 @@
  */
 class AbstractSpaceUpdate implements ModelInterface, ArrayAccess
 {
-    const DISCRIMINATOR = null;
+    const DISCRIMINATOR = [];
 
     /**
       * The original name of the model.
@@ -138,7 +138,7 @@ class AbstractSpaceUpdate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['last_modified_date'] = isset($data['last_modified_date']) ? $data['last_modified_date'] : null;
diff --git a/lib/Model/AbstractTokenUpdate.php b/lib/Model/AbstractTokenUpdate.php
index e840bd7..d9fe791 100644
--- a/lib/Model/AbstractTokenUpdate.php
+++ b/lib/Model/AbstractTokenUpdate.php
@@ -33,7 +33,7 @@
  */
 class AbstractTokenUpdate implements ModelInterface, ArrayAccess
 {
-    const DISCRIMINATOR = null;
+    const DISCRIMINATOR = [];
 
     /**
       * The original name of the model.
@@ -128,7 +128,7 @@ class AbstractTokenUpdate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['customer_email_address'] = isset($data['customer_email_address']) ? $data['customer_email_address'] : null;
diff --git a/lib/Model/AbstractTransactionCommentActive.php b/lib/Model/AbstractTransactionCommentActive.php
index 898e622..28a2892 100644
--- a/lib/Model/AbstractTransactionCommentActive.php
+++ b/lib/Model/AbstractTransactionCommentActive.php
@@ -33,7 +33,7 @@
  */
 class AbstractTransactionCommentActive implements ModelInterface, ArrayAccess
 {
-    const DISCRIMINATOR = null;
+    const DISCRIMINATOR = [];
 
     /**
       * The original name of the model.
@@ -103,7 +103,7 @@ class AbstractTransactionCommentActive implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['content'] = isset($data['content']) ? $data['content'] : null;
diff --git a/lib/Model/AbstractTransactionInvoiceCommentActive.php b/lib/Model/AbstractTransactionInvoiceCommentActive.php
index bcba8fe..100caed 100644
--- a/lib/Model/AbstractTransactionInvoiceCommentActive.php
+++ b/lib/Model/AbstractTransactionInvoiceCommentActive.php
@@ -33,7 +33,7 @@
  */
 class AbstractTransactionInvoiceCommentActive implements ModelInterface, ArrayAccess
 {
-    const DISCRIMINATOR = null;
+    const DISCRIMINATOR = [];
 
     /**
       * The original name of the model.
@@ -103,7 +103,7 @@ class AbstractTransactionInvoiceCommentActive implements ModelInterface, ArrayAc
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['content'] = isset($data['content']) ? $data['content'] : null;
diff --git a/lib/Model/AbstractTransactionPending.php b/lib/Model/AbstractTransactionPending.php
index c2ff673..86053ec 100644
--- a/lib/Model/AbstractTransactionPending.php
+++ b/lib/Model/AbstractTransactionPending.php
@@ -193,7 +193,7 @@ class AbstractTransactionPending implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['allowed_payment_method_brands'] = isset($data['allowed_payment_method_brands']) ? $data['allowed_payment_method_brands'] : null;
diff --git a/lib/Model/AbstractWebhookListenerUpdate.php b/lib/Model/AbstractWebhookListenerUpdate.php
index 9f4f829..e9db754 100644
--- a/lib/Model/AbstractWebhookListenerUpdate.php
+++ b/lib/Model/AbstractWebhookListenerUpdate.php
@@ -123,7 +123,7 @@ class AbstractWebhookListenerUpdate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['enable_payload_signature_and_state'] = isset($data['enable_payload_signature_and_state']) ? $data['enable_payload_signature_and_state'] : null;
diff --git a/lib/Model/AbstractWebhookUrlUpdate.php b/lib/Model/AbstractWebhookUrlUpdate.php
index 2c601da..a17b7f5 100644
--- a/lib/Model/AbstractWebhookUrlUpdate.php
+++ b/lib/Model/AbstractWebhookUrlUpdate.php
@@ -113,7 +113,7 @@ class AbstractWebhookUrlUpdate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
diff --git a/lib/Model/Account.php b/lib/Model/Account.php
index cbb410b..dc3e28f 100644
--- a/lib/Model/Account.php
+++ b/lib/Model/Account.php
@@ -184,7 +184,7 @@ class Account implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['active'] = isset($data['active']) ? $data['active'] : null;
diff --git a/lib/Model/AccountCreate.php b/lib/Model/AccountCreate.php
index b13857c..3c1b741 100644
--- a/lib/Model/AccountCreate.php
+++ b/lib/Model/AccountCreate.php
@@ -101,7 +101,7 @@ class AccountCreate extends AbstractAccountUpdate
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/AccountUpdate.php b/lib/Model/AccountUpdate.php
index e2f91cd..d2429f3 100644
--- a/lib/Model/AccountUpdate.php
+++ b/lib/Model/AccountUpdate.php
@@ -101,7 +101,7 @@ class AccountUpdate extends AbstractAccountUpdate
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/Address.php b/lib/Model/Address.php
index 4ff3b6b..f850945 100644
--- a/lib/Model/Address.php
+++ b/lib/Model/Address.php
@@ -199,7 +199,7 @@ class Address implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['city'] = isset($data['city']) ? $data['city'] : null;
diff --git a/lib/Model/AddressCreate.php b/lib/Model/AddressCreate.php
index 69ed54e..affe22c 100644
--- a/lib/Model/AddressCreate.php
+++ b/lib/Model/AddressCreate.php
@@ -199,7 +199,7 @@ class AddressCreate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['city'] = isset($data['city']) ? $data['city'] : null;
diff --git a/lib/Model/ApplicationUser.php b/lib/Model/ApplicationUser.php
index 1d8af78..1f3d69b 100644
--- a/lib/Model/ApplicationUser.php
+++ b/lib/Model/ApplicationUser.php
@@ -106,7 +106,7 @@ class ApplicationUser extends User
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ApplicationUserCreate.php b/lib/Model/ApplicationUserCreate.php
index 1e0198c..80bfe1b 100644
--- a/lib/Model/ApplicationUserCreate.php
+++ b/lib/Model/ApplicationUserCreate.php
@@ -96,7 +96,7 @@ class ApplicationUserCreate extends AbstractApplicationUserUpdate
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ApplicationUserCreateWithMacKey.php b/lib/Model/ApplicationUserCreateWithMacKey.php
index 3b3029f..85bd59f 100644
--- a/lib/Model/ApplicationUserCreateWithMacKey.php
+++ b/lib/Model/ApplicationUserCreateWithMacKey.php
@@ -96,7 +96,7 @@ class ApplicationUserCreateWithMacKey extends ApplicationUser
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ApplicationUserUpdate.php b/lib/Model/ApplicationUserUpdate.php
index 276d4d4..738ca76 100644
--- a/lib/Model/ApplicationUserUpdate.php
+++ b/lib/Model/ApplicationUserUpdate.php
@@ -101,7 +101,7 @@ class ApplicationUserUpdate extends AbstractApplicationUserUpdate
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/AuthenticatedCardData.php b/lib/Model/AuthenticatedCardData.php
index b19bbc1..640c5f1 100644
--- a/lib/Model/AuthenticatedCardData.php
+++ b/lib/Model/AuthenticatedCardData.php
@@ -96,7 +96,7 @@ class AuthenticatedCardData extends TokenizedCardData
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/AuthenticatedCardDataCreate.php b/lib/Model/AuthenticatedCardDataCreate.php
index f08920d..0d18b2e 100644
--- a/lib/Model/AuthenticatedCardDataCreate.php
+++ b/lib/Model/AuthenticatedCardDataCreate.php
@@ -149,7 +149,7 @@ class AuthenticatedCardDataCreate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['card_holder_name'] = isset($data['card_holder_name']) ? $data['card_holder_name'] : null;
diff --git a/lib/Model/BankAccount.php b/lib/Model/BankAccount.php
index 2df0681..5c1ea24 100644
--- a/lib/Model/BankAccount.php
+++ b/lib/Model/BankAccount.php
@@ -139,7 +139,7 @@ class BankAccount implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/BankAccountType.php b/lib/Model/BankAccountType.php
index 7791326..358a810 100644
--- a/lib/Model/BankAccountType.php
+++ b/lib/Model/BankAccountType.php
@@ -119,7 +119,7 @@ class BankAccountType implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/BankTransaction.php b/lib/Model/BankTransaction.php
index 839ebdf..055d17b 100644
--- a/lib/Model/BankTransaction.php
+++ b/lib/Model/BankTransaction.php
@@ -194,7 +194,7 @@ class BankTransaction implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['adjustments'] = isset($data['adjustments']) ? $data['adjustments'] : null;
diff --git a/lib/Model/BankTransactionSource.php b/lib/Model/BankTransactionSource.php
index 5ca8bbe..cb90330 100644
--- a/lib/Model/BankTransactionSource.php
+++ b/lib/Model/BankTransactionSource.php
@@ -114,7 +114,7 @@ class BankTransactionSource implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/BankTransactionType.php b/lib/Model/BankTransactionType.php
index b566606..363587d 100644
--- a/lib/Model/BankTransactionType.php
+++ b/lib/Model/BankTransactionType.php
@@ -114,7 +114,7 @@ class BankTransactionType implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/BillingConfiguration.php b/lib/Model/BillingConfiguration.php
index eadb86a..9e3cbb4 100644
--- a/lib/Model/BillingConfiguration.php
+++ b/lib/Model/BillingConfiguration.php
@@ -144,7 +144,7 @@ class BillingConfiguration implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['billing_day_of_month'] = isset($data['billing_day_of_month']) ? $data['billing_day_of_month'] : null;
diff --git a/lib/Model/CardCryptogram.php b/lib/Model/CardCryptogram.php
index 0d62dfe..75b3574 100644
--- a/lib/Model/CardCryptogram.php
+++ b/lib/Model/CardCryptogram.php
@@ -109,7 +109,7 @@ class CardCryptogram implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['eci'] = isset($data['eci']) ? $data['eci'] : null;
diff --git a/lib/Model/CardCryptogramCreate.php b/lib/Model/CardCryptogramCreate.php
index 0922991..4d7bd20 100644
--- a/lib/Model/CardCryptogramCreate.php
+++ b/lib/Model/CardCryptogramCreate.php
@@ -109,7 +109,7 @@ class CardCryptogramCreate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['eci'] = isset($data['eci']) ? $data['eci'] : null;
diff --git a/lib/Model/CardholderAuthentication.php b/lib/Model/CardholderAuthentication.php
index 1c73904..2efacaf 100644
--- a/lib/Model/CardholderAuthentication.php
+++ b/lib/Model/CardholderAuthentication.php
@@ -124,7 +124,7 @@ class CardholderAuthentication implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['authentication_identifier'] = isset($data['authentication_identifier']) ? $data['authentication_identifier'] : null;
diff --git a/lib/Model/CardholderAuthenticationCreate.php b/lib/Model/CardholderAuthenticationCreate.php
index 46dac83..f6174aa 100644
--- a/lib/Model/CardholderAuthenticationCreate.php
+++ b/lib/Model/CardholderAuthenticationCreate.php
@@ -124,7 +124,7 @@ class CardholderAuthenticationCreate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['authentication_identifier'] = isset($data['authentication_identifier']) ? $data['authentication_identifier'] : null;
diff --git a/lib/Model/Charge.php b/lib/Model/Charge.php
index 28449b3..888e7f0 100644
--- a/lib/Model/Charge.php
+++ b/lib/Model/Charge.php
@@ -151,7 +151,7 @@ class Charge extends TransactionAwareEntity
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ChargeAttempt.php b/lib/Model/ChargeAttempt.php
index cd9a57e..71d2f90 100644
--- a/lib/Model/ChargeAttempt.php
+++ b/lib/Model/ChargeAttempt.php
@@ -221,7 +221,7 @@ class ChargeAttempt extends TransactionAwareEntity
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ChargeBankTransaction.php b/lib/Model/ChargeBankTransaction.php
index 72d22f1..2465bce 100644
--- a/lib/Model/ChargeBankTransaction.php
+++ b/lib/Model/ChargeBankTransaction.php
@@ -131,7 +131,7 @@ class ChargeBankTransaction extends TransactionAwareEntity
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ChargeFlow.php b/lib/Model/ChargeFlow.php
index 4f25f29..a138a4b 100644
--- a/lib/Model/ChargeFlow.php
+++ b/lib/Model/ChargeFlow.php
@@ -139,7 +139,7 @@ class ChargeFlow implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['conditions'] = isset($data['conditions']) ? $data['conditions'] : null;
diff --git a/lib/Model/ChargeFlowLevel.php b/lib/Model/ChargeFlowLevel.php
index aba541c..92f23e0 100644
--- a/lib/Model/ChargeFlowLevel.php
+++ b/lib/Model/ChargeFlowLevel.php
@@ -141,7 +141,7 @@ class ChargeFlowLevel extends TransactionAwareEntity
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ChargeFlowLevelConfiguration.php b/lib/Model/ChargeFlowLevelConfiguration.php
index 5177087..b885179 100644
--- a/lib/Model/ChargeFlowLevelConfiguration.php
+++ b/lib/Model/ChargeFlowLevelConfiguration.php
@@ -149,7 +149,7 @@ class ChargeFlowLevelConfiguration implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['flow'] = isset($data['flow']) ? $data['flow'] : null;
diff --git a/lib/Model/ChargeFlowLevelConfigurationType.php b/lib/Model/ChargeFlowLevelConfigurationType.php
index 4525ab7..28fb71e 100644
--- a/lib/Model/ChargeFlowLevelConfigurationType.php
+++ b/lib/Model/ChargeFlowLevelConfigurationType.php
@@ -119,7 +119,7 @@ class ChargeFlowLevelConfigurationType implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/ChargeFlowLevelPaymentLink.php b/lib/Model/ChargeFlowLevelPaymentLink.php
index ed9738b..be5c9af 100644
--- a/lib/Model/ChargeFlowLevelPaymentLink.php
+++ b/lib/Model/ChargeFlowLevelPaymentLink.php
@@ -101,7 +101,7 @@ class ChargeFlowLevelPaymentLink extends TransactionAwareEntity
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/CompletionLineItem.php b/lib/Model/CompletionLineItem.php
index 14f9caa..370338f 100644
--- a/lib/Model/CompletionLineItem.php
+++ b/lib/Model/CompletionLineItem.php
@@ -114,7 +114,7 @@ class CompletionLineItem implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['amount'] = isset($data['amount']) ? $data['amount'] : null;
diff --git a/lib/Model/CompletionLineItemCreate.php b/lib/Model/CompletionLineItemCreate.php
index 9bb1e45..2939c29 100644
--- a/lib/Model/CompletionLineItemCreate.php
+++ b/lib/Model/CompletionLineItemCreate.php
@@ -114,7 +114,7 @@ class CompletionLineItemCreate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['amount'] = isset($data['amount']) ? $data['amount'] : null;
diff --git a/lib/Model/Condition.php b/lib/Model/Condition.php
index 2fac2fc..427bdb9 100644
--- a/lib/Model/Condition.php
+++ b/lib/Model/Condition.php
@@ -134,7 +134,7 @@ class Condition implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['condition_type'] = isset($data['condition_type']) ? $data['condition_type'] : null;
diff --git a/lib/Model/ConditionType.php b/lib/Model/ConditionType.php
index 402a1c3..8b6c380 100644
--- a/lib/Model/ConditionType.php
+++ b/lib/Model/ConditionType.php
@@ -114,7 +114,7 @@ class ConditionType implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/ConnectorInvocation.php b/lib/Model/ConnectorInvocation.php
index 47ae0fd..a30f8b3 100644
--- a/lib/Model/ConnectorInvocation.php
+++ b/lib/Model/ConnectorInvocation.php
@@ -121,7 +121,7 @@ class ConnectorInvocation extends TransactionAwareEntity
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/CurrencyBankAccount.php b/lib/Model/CurrencyBankAccount.php
index 0fafbb3..547c17c 100644
--- a/lib/Model/CurrencyBankAccount.php
+++ b/lib/Model/CurrencyBankAccount.php
@@ -129,7 +129,7 @@ class CurrencyBankAccount implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['bank_account'] = isset($data['bank_account']) ? $data['bank_account'] : null;
diff --git a/lib/Model/Customer.php b/lib/Model/Customer.php
index 5226185..7fe2f1f 100644
--- a/lib/Model/Customer.php
+++ b/lib/Model/Customer.php
@@ -154,7 +154,7 @@ class Customer implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['created_on'] = isset($data['created_on']) ? $data['created_on'] : null;
diff --git a/lib/Model/CustomerActive.php b/lib/Model/CustomerActive.php
index 9704455..229d929 100644
--- a/lib/Model/CustomerActive.php
+++ b/lib/Model/CustomerActive.php
@@ -101,7 +101,7 @@ class CustomerActive extends AbstractCustomerActive
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/CustomerAddress.php b/lib/Model/CustomerAddress.php
index 4c53ff0..0952fdd 100644
--- a/lib/Model/CustomerAddress.php
+++ b/lib/Model/CustomerAddress.php
@@ -139,7 +139,7 @@ class CustomerAddress implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['address'] = isset($data['address']) ? $data['address'] : null;
diff --git a/lib/Model/CustomerAddressActive.php b/lib/Model/CustomerAddressActive.php
index e16aa01..f28ed44 100644
--- a/lib/Model/CustomerAddressActive.php
+++ b/lib/Model/CustomerAddressActive.php
@@ -101,7 +101,7 @@ class CustomerAddressActive extends AbstractCustomerAddressActive
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/CustomerAddressCreate.php b/lib/Model/CustomerAddressCreate.php
index 4b03027..e1a4a79 100644
--- a/lib/Model/CustomerAddressCreate.php
+++ b/lib/Model/CustomerAddressCreate.php
@@ -96,7 +96,7 @@ class CustomerAddressCreate extends AbstractCustomerAddressActive
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/CustomerComment.php b/lib/Model/CustomerComment.php
index e321093..1577234 100644
--- a/lib/Model/CustomerComment.php
+++ b/lib/Model/CustomerComment.php
@@ -149,7 +149,7 @@ class CustomerComment implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['content'] = isset($data['content']) ? $data['content'] : null;
diff --git a/lib/Model/CustomerCommentActive.php b/lib/Model/CustomerCommentActive.php
index 0050fd1..ee201e8 100644
--- a/lib/Model/CustomerCommentActive.php
+++ b/lib/Model/CustomerCommentActive.php
@@ -101,7 +101,7 @@ class CustomerCommentActive extends AbstractCustomerCommentActive
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/CustomerCommentCreate.php b/lib/Model/CustomerCommentCreate.php
index 79624c8..d26d68f 100644
--- a/lib/Model/CustomerCommentCreate.php
+++ b/lib/Model/CustomerCommentCreate.php
@@ -96,7 +96,7 @@ class CustomerCommentCreate extends AbstractCustomerCommentActive
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/CustomerCreate.php b/lib/Model/CustomerCreate.php
index 1e187d6..e11b11a 100644
--- a/lib/Model/CustomerCreate.php
+++ b/lib/Model/CustomerCreate.php
@@ -96,7 +96,7 @@ class CustomerCreate extends AbstractCustomerActive
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/CustomerPostalAddress.php b/lib/Model/CustomerPostalAddress.php
index 104d499..9e9b7e2 100644
--- a/lib/Model/CustomerPostalAddress.php
+++ b/lib/Model/CustomerPostalAddress.php
@@ -199,7 +199,7 @@ class CustomerPostalAddress implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['city'] = isset($data['city']) ? $data['city'] : null;
diff --git a/lib/Model/CustomerPostalAddressCreate.php b/lib/Model/CustomerPostalAddressCreate.php
index c84acf9..6c3e493 100644
--- a/lib/Model/CustomerPostalAddressCreate.php
+++ b/lib/Model/CustomerPostalAddressCreate.php
@@ -199,7 +199,7 @@ class CustomerPostalAddressCreate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['city'] = isset($data['city']) ? $data['city'] : null;
diff --git a/lib/Model/DeliveryIndication.php b/lib/Model/DeliveryIndication.php
index 17ef724..78e3286 100644
--- a/lib/Model/DeliveryIndication.php
+++ b/lib/Model/DeliveryIndication.php
@@ -146,7 +146,7 @@ class DeliveryIndication extends TransactionAwareEntity
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/DeliveryIndicationDecisionReason.php b/lib/Model/DeliveryIndicationDecisionReason.php
index 19e6f94..05c4be7 100644
--- a/lib/Model/DeliveryIndicationDecisionReason.php
+++ b/lib/Model/DeliveryIndicationDecisionReason.php
@@ -114,7 +114,7 @@ class DeliveryIndicationDecisionReason implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/DocumentTemplate.php b/lib/Model/DocumentTemplate.php
index 76a55f4..4ef135d 100644
--- a/lib/Model/DocumentTemplate.php
+++ b/lib/Model/DocumentTemplate.php
@@ -154,7 +154,7 @@ class DocumentTemplate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['default_template'] = isset($data['default_template']) ? $data['default_template'] : null;
diff --git a/lib/Model/DocumentTemplateType.php b/lib/Model/DocumentTemplateType.php
index b35d28e..ba2987d 100644
--- a/lib/Model/DocumentTemplateType.php
+++ b/lib/Model/DocumentTemplateType.php
@@ -124,7 +124,7 @@ class DocumentTemplateType implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/DocumentTemplateTypeGroup.php b/lib/Model/DocumentTemplateTypeGroup.php
index 3c7e62c..07b2814 100644
--- a/lib/Model/DocumentTemplateTypeGroup.php
+++ b/lib/Model/DocumentTemplateTypeGroup.php
@@ -109,7 +109,7 @@ class DocumentTemplateTypeGroup implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/EntityExportRequest.php b/lib/Model/EntityExportRequest.php
index dff441a..c341cbe 100644
--- a/lib/Model/EntityExportRequest.php
+++ b/lib/Model/EntityExportRequest.php
@@ -109,7 +109,7 @@ class EntityExportRequest implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['properties'] = isset($data['properties']) ? $data['properties'] : null;
diff --git a/lib/Model/EntityQuery.php b/lib/Model/EntityQuery.php
index 691eb83..f2aa649 100644
--- a/lib/Model/EntityQuery.php
+++ b/lib/Model/EntityQuery.php
@@ -124,7 +124,7 @@ class EntityQuery implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['filter'] = isset($data['filter']) ? $data['filter'] : null;
diff --git a/lib/Model/EntityQueryFilter.php b/lib/Model/EntityQueryFilter.php
index 88d7ad4..102460d 100644
--- a/lib/Model/EntityQueryFilter.php
+++ b/lib/Model/EntityQueryFilter.php
@@ -124,7 +124,7 @@ class EntityQueryFilter implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['children'] = isset($data['children']) ? $data['children'] : null;
diff --git a/lib/Model/EntityQueryOrderBy.php b/lib/Model/EntityQueryOrderBy.php
index 3145f17..24a45e6 100644
--- a/lib/Model/EntityQueryOrderBy.php
+++ b/lib/Model/EntityQueryOrderBy.php
@@ -109,7 +109,7 @@ class EntityQueryOrderBy implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['field_name'] = isset($data['field_name']) ? $data['field_name'] : null;
diff --git a/lib/Model/ExternalTransferBankTransaction.php b/lib/Model/ExternalTransferBankTransaction.php
index b93f74f..5d1cacc 100644
--- a/lib/Model/ExternalTransferBankTransaction.php
+++ b/lib/Model/ExternalTransferBankTransaction.php
@@ -134,7 +134,7 @@ class ExternalTransferBankTransaction implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['bank_transaction'] = isset($data['bank_transaction']) ? $data['bank_transaction'] : null;
diff --git a/lib/Model/FailureReason.php b/lib/Model/FailureReason.php
index 6a5bc2a..ea992f2 100644
--- a/lib/Model/FailureReason.php
+++ b/lib/Model/FailureReason.php
@@ -119,7 +119,7 @@ class FailureReason implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['category'] = isset($data['category']) ? $data['category'] : null;
diff --git a/lib/Model/Feature.php b/lib/Model/Feature.php
index 513f8e8..e1687fb 100644
--- a/lib/Model/Feature.php
+++ b/lib/Model/Feature.php
@@ -144,7 +144,7 @@ class Feature implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['beta'] = isset($data['beta']) ? $data['beta'] : null;
diff --git a/lib/Model/FeatureCategory.php b/lib/Model/FeatureCategory.php
index dd39105..b087f61 100644
--- a/lib/Model/FeatureCategory.php
+++ b/lib/Model/FeatureCategory.php
@@ -119,7 +119,7 @@ class FeatureCategory implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/HumanUser.php b/lib/Model/HumanUser.php
index 60e7e39..a67a721 100644
--- a/lib/Model/HumanUser.php
+++ b/lib/Model/HumanUser.php
@@ -159,7 +159,7 @@ class HumanUser implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['email_address'] = isset($data['email_address']) ? $data['email_address'] : null;
diff --git a/lib/Model/HumanUserCreate.php b/lib/Model/HumanUserCreate.php
index d50289a..6f0b91e 100644
--- a/lib/Model/HumanUserCreate.php
+++ b/lib/Model/HumanUserCreate.php
@@ -96,7 +96,7 @@ class HumanUserCreate extends AbstractHumanUserUpdate
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/HumanUserUpdate.php b/lib/Model/HumanUserUpdate.php
index 8212e4a..0668e18 100644
--- a/lib/Model/HumanUserUpdate.php
+++ b/lib/Model/HumanUserUpdate.php
@@ -101,7 +101,7 @@ class HumanUserUpdate extends AbstractHumanUserUpdate
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/InternalTransferBankTransaction.php b/lib/Model/InternalTransferBankTransaction.php
index d19e747..5aebbe7 100644
--- a/lib/Model/InternalTransferBankTransaction.php
+++ b/lib/Model/InternalTransferBankTransaction.php
@@ -124,7 +124,7 @@ class InternalTransferBankTransaction implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/InvoiceReconciliationRecord.php b/lib/Model/InvoiceReconciliationRecord.php
index 6ba5f29..a5c81f5 100644
--- a/lib/Model/InvoiceReconciliationRecord.php
+++ b/lib/Model/InvoiceReconciliationRecord.php
@@ -241,7 +241,7 @@ class InvoiceReconciliationRecord extends TransactionAwareEntity
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/InvoiceReconciliationRecordInvoiceLink.php b/lib/Model/InvoiceReconciliationRecordInvoiceLink.php
index 62325ed..bd79544 100644
--- a/lib/Model/InvoiceReconciliationRecordInvoiceLink.php
+++ b/lib/Model/InvoiceReconciliationRecordInvoiceLink.php
@@ -129,7 +129,7 @@ class InvoiceReconciliationRecordInvoiceLink implements ModelInterface, ArrayAcc
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['amount'] = isset($data['amount']) ? $data['amount'] : null;
diff --git a/lib/Model/InvoiceReconciliationRecordType.php b/lib/Model/InvoiceReconciliationRecordType.php
index 15d034d..7ecf6be 100644
--- a/lib/Model/InvoiceReconciliationRecordType.php
+++ b/lib/Model/InvoiceReconciliationRecordType.php
@@ -114,7 +114,7 @@ class InvoiceReconciliationRecordType implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/InvoiceReimbursement.php b/lib/Model/InvoiceReimbursement.php
index ee92304..073bbed 100644
--- a/lib/Model/InvoiceReimbursement.php
+++ b/lib/Model/InvoiceReimbursement.php
@@ -209,7 +209,7 @@ class InvoiceReimbursement implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['amount'] = isset($data['amount']) ? $data['amount'] : null;
diff --git a/lib/Model/InvoiceReimbursementWithRefundReference.php b/lib/Model/InvoiceReimbursementWithRefundReference.php
index 72572a9..961b8df 100644
--- a/lib/Model/InvoiceReimbursementWithRefundReference.php
+++ b/lib/Model/InvoiceReimbursementWithRefundReference.php
@@ -96,7 +96,7 @@ class InvoiceReimbursementWithRefundReference extends InvoiceReimbursement
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/Item.php b/lib/Model/Item.php
index 24043a0..15404b4 100644
--- a/lib/Model/Item.php
+++ b/lib/Model/Item.php
@@ -124,7 +124,7 @@ class Item implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['price_including_tax'] = isset($data['price_including_tax']) ? $data['price_including_tax'] : null;
diff --git a/lib/Model/Label.php b/lib/Model/Label.php
index 063ba1d..d827b6f 100644
--- a/lib/Model/Label.php
+++ b/lib/Model/Label.php
@@ -114,7 +114,7 @@ class Label implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['content'] = isset($data['content']) ? $data['content'] : null;
diff --git a/lib/Model/LabelDescriptor.php b/lib/Model/LabelDescriptor.php
index 4ec6361..58b3056 100644
--- a/lib/Model/LabelDescriptor.php
+++ b/lib/Model/LabelDescriptor.php
@@ -139,7 +139,7 @@ class LabelDescriptor implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['category'] = isset($data['category']) ? $data['category'] : null;
diff --git a/lib/Model/LabelDescriptorGroup.php b/lib/Model/LabelDescriptorGroup.php
index 046bd67..310afdd 100644
--- a/lib/Model/LabelDescriptorGroup.php
+++ b/lib/Model/LabelDescriptorGroup.php
@@ -119,7 +119,7 @@ class LabelDescriptorGroup implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/LabelDescriptorType.php b/lib/Model/LabelDescriptorType.php
index 52acea7..de073f3 100644
--- a/lib/Model/LabelDescriptorType.php
+++ b/lib/Model/LabelDescriptorType.php
@@ -114,7 +114,7 @@ class LabelDescriptorType implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/LegalOrganizationForm.php b/lib/Model/LegalOrganizationForm.php
index e06ba37..a815402 100644
--- a/lib/Model/LegalOrganizationForm.php
+++ b/lib/Model/LegalOrganizationForm.php
@@ -124,7 +124,7 @@ class LegalOrganizationForm implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['country'] = isset($data['country']) ? $data['country'] : null;
diff --git a/lib/Model/LineItem.php b/lib/Model/LineItem.php
index 1d562eb..c23079b 100644
--- a/lib/Model/LineItem.php
+++ b/lib/Model/LineItem.php
@@ -204,7 +204,7 @@ class LineItem implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['aggregated_tax_rate'] = isset($data['aggregated_tax_rate']) ? $data['aggregated_tax_rate'] : null;
diff --git a/lib/Model/LineItemAttribute.php b/lib/Model/LineItemAttribute.php
index 9a8e00d..1603e5e 100644
--- a/lib/Model/LineItemAttribute.php
+++ b/lib/Model/LineItemAttribute.php
@@ -109,7 +109,7 @@ class LineItemAttribute implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['label'] = isset($data['label']) ? $data['label'] : null;
diff --git a/lib/Model/LineItemAttributeCreate.php b/lib/Model/LineItemAttributeCreate.php
index 7a6d0f8..8d03a76 100644
--- a/lib/Model/LineItemAttributeCreate.php
+++ b/lib/Model/LineItemAttributeCreate.php
@@ -109,7 +109,7 @@ class LineItemAttributeCreate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['label'] = isset($data['label']) ? $data['label'] : null;
diff --git a/lib/Model/LineItemCreate.php b/lib/Model/LineItemCreate.php
index a9a58cb..6c6ccc3 100644
--- a/lib/Model/LineItemCreate.php
+++ b/lib/Model/LineItemCreate.php
@@ -149,7 +149,7 @@ class LineItemCreate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['amount_including_tax'] = isset($data['amount_including_tax']) ? $data['amount_including_tax'] : null;
diff --git a/lib/Model/LineItemReduction.php b/lib/Model/LineItemReduction.php
index a9a04a6..431b390 100644
--- a/lib/Model/LineItemReduction.php
+++ b/lib/Model/LineItemReduction.php
@@ -114,7 +114,7 @@ class LineItemReduction implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['line_item_unique_id'] = isset($data['line_item_unique_id']) ? $data['line_item_unique_id'] : null;
diff --git a/lib/Model/LineItemReductionCreate.php b/lib/Model/LineItemReductionCreate.php
index 2ee6a99..3df0300 100644
--- a/lib/Model/LineItemReductionCreate.php
+++ b/lib/Model/LineItemReductionCreate.php
@@ -114,7 +114,7 @@ class LineItemReductionCreate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['line_item_unique_id'] = isset($data['line_item_unique_id']) ? $data['line_item_unique_id'] : null;
diff --git a/lib/Model/LocalizedString.php b/lib/Model/LocalizedString.php
index 992d856..41c95bf 100644
--- a/lib/Model/LocalizedString.php
+++ b/lib/Model/LocalizedString.php
@@ -109,7 +109,7 @@ class LocalizedString implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['language'] = isset($data['language']) ? $data['language'] : null;
diff --git a/lib/Model/ManualTask.php b/lib/Model/ManualTask.php
index 7be59c9..fdebe1d 100644
--- a/lib/Model/ManualTask.php
+++ b/lib/Model/ManualTask.php
@@ -144,7 +144,7 @@ class ManualTask implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['actions'] = isset($data['actions']) ? $data['actions'] : null;
diff --git a/lib/Model/ManualTaskAction.php b/lib/Model/ManualTaskAction.php
index eb08151..1c71184 100644
--- a/lib/Model/ManualTaskAction.php
+++ b/lib/Model/ManualTaskAction.php
@@ -119,7 +119,7 @@ class ManualTaskAction implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/ManualTaskType.php b/lib/Model/ManualTaskType.php
index 7fbea71..cce338b 100644
--- a/lib/Model/ManualTaskType.php
+++ b/lib/Model/ManualTaskType.php
@@ -119,7 +119,7 @@ class ManualTaskType implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/ModelResourcePath.php b/lib/Model/ModelResourcePath.php
index da54f82..a08adec 100644
--- a/lib/Model/ModelResourcePath.php
+++ b/lib/Model/ModelResourcePath.php
@@ -134,7 +134,7 @@ class ModelResourcePath implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/PaymentAdjustment.php b/lib/Model/PaymentAdjustment.php
index 903dfa9..0f8c3a5 100644
--- a/lib/Model/PaymentAdjustment.php
+++ b/lib/Model/PaymentAdjustment.php
@@ -129,7 +129,7 @@ class PaymentAdjustment implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['amount_excluding_tax'] = isset($data['amount_excluding_tax']) ? $data['amount_excluding_tax'] : null;
diff --git a/lib/Model/PaymentAdjustmentType.php b/lib/Model/PaymentAdjustmentType.php
index 2513e20..ea3bae5 100644
--- a/lib/Model/PaymentAdjustmentType.php
+++ b/lib/Model/PaymentAdjustmentType.php
@@ -114,7 +114,7 @@ class PaymentAdjustmentType implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/PaymentConnector.php b/lib/Model/PaymentConnector.php
index c94ad07..c15be7b 100644
--- a/lib/Model/PaymentConnector.php
+++ b/lib/Model/PaymentConnector.php
@@ -164,7 +164,7 @@ class PaymentConnector implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['data_collection_type'] = isset($data['data_collection_type']) ? $data['data_collection_type'] : null;
diff --git a/lib/Model/PaymentConnectorConfiguration.php b/lib/Model/PaymentConnectorConfiguration.php
index 1a8f8f1..cd5cc2f 100644
--- a/lib/Model/PaymentConnectorConfiguration.php
+++ b/lib/Model/PaymentConnectorConfiguration.php
@@ -174,7 +174,7 @@ class PaymentConnectorConfiguration implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['applicable_for_transaction_processing'] = isset($data['applicable_for_transaction_processing']) ? $data['applicable_for_transaction_processing'] : null;
diff --git a/lib/Model/PaymentConnectorFeature.php b/lib/Model/PaymentConnectorFeature.php
index f8b4ad7..64928bb 100644
--- a/lib/Model/PaymentConnectorFeature.php
+++ b/lib/Model/PaymentConnectorFeature.php
@@ -109,7 +109,7 @@ class PaymentConnectorFeature implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['display_name'] = isset($data['display_name']) ? $data['display_name'] : null;
diff --git a/lib/Model/PaymentContract.php b/lib/Model/PaymentContract.php
index c8ea261..da126c1 100644
--- a/lib/Model/PaymentContract.php
+++ b/lib/Model/PaymentContract.php
@@ -179,7 +179,7 @@ class PaymentContract implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['account'] = isset($data['account']) ? $data['account'] : null;
diff --git a/lib/Model/PaymentContractType.php b/lib/Model/PaymentContractType.php
index 90a004b..7b2128e 100644
--- a/lib/Model/PaymentContractType.php
+++ b/lib/Model/PaymentContractType.php
@@ -114,7 +114,7 @@ class PaymentContractType implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/PaymentInformationHash.php b/lib/Model/PaymentInformationHash.php
index 08e2a6f..7dc6368 100644
--- a/lib/Model/PaymentInformationHash.php
+++ b/lib/Model/PaymentInformationHash.php
@@ -114,7 +114,7 @@ class PaymentInformationHash implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/PaymentInformationHashType.php b/lib/Model/PaymentInformationHashType.php
index 44346fe..e6f61b1 100644
--- a/lib/Model/PaymentInformationHashType.php
+++ b/lib/Model/PaymentInformationHashType.php
@@ -109,7 +109,7 @@ class PaymentInformationHashType implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/PaymentInitiationAdviceFile.php b/lib/Model/PaymentInitiationAdviceFile.php
index 0958411..1535316 100644
--- a/lib/Model/PaymentInitiationAdviceFile.php
+++ b/lib/Model/PaymentInitiationAdviceFile.php
@@ -149,7 +149,7 @@ class PaymentInitiationAdviceFile implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['created_on'] = isset($data['created_on']) ? $data['created_on'] : null;
diff --git a/lib/Model/PaymentLink.php b/lib/Model/PaymentLink.php
index 1fe6327..a693bf0 100644
--- a/lib/Model/PaymentLink.php
+++ b/lib/Model/PaymentLink.php
@@ -194,7 +194,7 @@ class PaymentLink implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['allowed_payment_method_configurations'] = isset($data['allowed_payment_method_configurations']) ? $data['allowed_payment_method_configurations'] : null;
diff --git a/lib/Model/PaymentLinkActive.php b/lib/Model/PaymentLinkActive.php
index 5c9dfac..760a8c7 100644
--- a/lib/Model/PaymentLinkActive.php
+++ b/lib/Model/PaymentLinkActive.php
@@ -96,7 +96,7 @@ class PaymentLinkActive extends PaymentLinkUpdate
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/PaymentLinkCreate.php b/lib/Model/PaymentLinkCreate.php
index 76a6a48..49d4bcb 100644
--- a/lib/Model/PaymentLinkCreate.php
+++ b/lib/Model/PaymentLinkCreate.php
@@ -106,7 +106,7 @@ class PaymentLinkCreate extends AbstractPaymentLinkUpdate
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/PaymentLinkUpdate.php b/lib/Model/PaymentLinkUpdate.php
index 0a2529b..45a3599 100644
--- a/lib/Model/PaymentLinkUpdate.php
+++ b/lib/Model/PaymentLinkUpdate.php
@@ -164,7 +164,7 @@ class PaymentLinkUpdate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/PaymentMethod.php b/lib/Model/PaymentMethod.php
index 592a157..2d22161 100644
--- a/lib/Model/PaymentMethod.php
+++ b/lib/Model/PaymentMethod.php
@@ -134,7 +134,7 @@ class PaymentMethod implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['data_collection_types'] = isset($data['data_collection_types']) ? $data['data_collection_types'] : null;
diff --git a/lib/Model/PaymentMethodBrand.php b/lib/Model/PaymentMethodBrand.php
index 938c48a..9cbad6a 100644
--- a/lib/Model/PaymentMethodBrand.php
+++ b/lib/Model/PaymentMethodBrand.php
@@ -129,7 +129,7 @@ class PaymentMethodBrand implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/PaymentMethodConfiguration.php b/lib/Model/PaymentMethodConfiguration.php
index 85a81a5..0f81269 100644
--- a/lib/Model/PaymentMethodConfiguration.php
+++ b/lib/Model/PaymentMethodConfiguration.php
@@ -184,7 +184,7 @@ class PaymentMethodConfiguration implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['data_collection_type'] = isset($data['data_collection_type']) ? $data['data_collection_type'] : null;
diff --git a/lib/Model/PaymentProcessor.php b/lib/Model/PaymentProcessor.php
index 25d4c0f..91bf4d3 100644
--- a/lib/Model/PaymentProcessor.php
+++ b/lib/Model/PaymentProcessor.php
@@ -134,7 +134,7 @@ class PaymentProcessor implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['company_name'] = isset($data['company_name']) ? $data['company_name'] : null;
diff --git a/lib/Model/PaymentProcessorConfiguration.php b/lib/Model/PaymentProcessorConfiguration.php
index 6d3a30e..48ead6d 100644
--- a/lib/Model/PaymentProcessorConfiguration.php
+++ b/lib/Model/PaymentProcessorConfiguration.php
@@ -144,7 +144,7 @@ class PaymentProcessorConfiguration implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['application_managed'] = isset($data['application_managed']) ? $data['application_managed'] : null;
diff --git a/lib/Model/PaymentTerminal.php b/lib/Model/PaymentTerminal.php
index 2fdf84b..3523fae 100644
--- a/lib/Model/PaymentTerminal.php
+++ b/lib/Model/PaymentTerminal.php
@@ -169,7 +169,7 @@ class PaymentTerminal implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['configuration_version'] = isset($data['configuration_version']) ? $data['configuration_version'] : null;
diff --git a/lib/Model/PaymentTerminalAddress.php b/lib/Model/PaymentTerminalAddress.php
index b99cc01..67cbfec 100644
--- a/lib/Model/PaymentTerminalAddress.php
+++ b/lib/Model/PaymentTerminalAddress.php
@@ -169,7 +169,7 @@ class PaymentTerminalAddress implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['city'] = isset($data['city']) ? $data['city'] : null;
diff --git a/lib/Model/PaymentTerminalConfiguration.php b/lib/Model/PaymentTerminalConfiguration.php
index 66b368d..a6f20a9 100644
--- a/lib/Model/PaymentTerminalConfiguration.php
+++ b/lib/Model/PaymentTerminalConfiguration.php
@@ -134,7 +134,7 @@ class PaymentTerminalConfiguration implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/PaymentTerminalConfigurationVersion.php b/lib/Model/PaymentTerminalConfigurationVersion.php
index 1e065b2..20a5463 100644
--- a/lib/Model/PaymentTerminalConfigurationVersion.php
+++ b/lib/Model/PaymentTerminalConfigurationVersion.php
@@ -169,7 +169,7 @@ class PaymentTerminalConfigurationVersion implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['configuration'] = isset($data['configuration']) ? $data['configuration'] : null;
diff --git a/lib/Model/PaymentTerminalDccTransactionSum.php b/lib/Model/PaymentTerminalDccTransactionSum.php
index a392bae..f5d3a3d 100644
--- a/lib/Model/PaymentTerminalDccTransactionSum.php
+++ b/lib/Model/PaymentTerminalDccTransactionSum.php
@@ -139,7 +139,7 @@ class PaymentTerminalDccTransactionSum implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['brand'] = isset($data['brand']) ? $data['brand'] : null;
diff --git a/lib/Model/PaymentTerminalLocation.php b/lib/Model/PaymentTerminalLocation.php
index 95cf5dd..46b7f0b 100644
--- a/lib/Model/PaymentTerminalLocation.php
+++ b/lib/Model/PaymentTerminalLocation.php
@@ -134,7 +134,7 @@ class PaymentTerminalLocation implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['external_id'] = isset($data['external_id']) ? $data['external_id'] : null;
diff --git a/lib/Model/PaymentTerminalLocationVersion.php b/lib/Model/PaymentTerminalLocationVersion.php
index c7e7887..136acd2 100644
--- a/lib/Model/PaymentTerminalLocationVersion.php
+++ b/lib/Model/PaymentTerminalLocationVersion.php
@@ -154,7 +154,7 @@ class PaymentTerminalLocationVersion implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['address'] = isset($data['address']) ? $data['address'] : null;
diff --git a/lib/Model/PaymentTerminalReceiptType.php b/lib/Model/PaymentTerminalReceiptType.php
index e86c84b..8e8b3af 100644
--- a/lib/Model/PaymentTerminalReceiptType.php
+++ b/lib/Model/PaymentTerminalReceiptType.php
@@ -114,7 +114,7 @@ class PaymentTerminalReceiptType implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/PaymentTerminalTransactionSum.php b/lib/Model/PaymentTerminalTransactionSum.php
index a350902..f8d5d16 100644
--- a/lib/Model/PaymentTerminalTransactionSum.php
+++ b/lib/Model/PaymentTerminalTransactionSum.php
@@ -154,7 +154,7 @@ class PaymentTerminalTransactionSum implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['brand'] = isset($data['brand']) ? $data['brand'] : null;
diff --git a/lib/Model/PaymentTerminalTransactionSummary.php b/lib/Model/PaymentTerminalTransactionSummary.php
index df771f6..e89612f 100644
--- a/lib/Model/PaymentTerminalTransactionSummary.php
+++ b/lib/Model/PaymentTerminalTransactionSummary.php
@@ -154,7 +154,7 @@ class PaymentTerminalTransactionSummary implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['dcc_transaction_sums'] = isset($data['dcc_transaction_sums']) ? $data['dcc_transaction_sums'] : null;
diff --git a/lib/Model/PaymentTerminalTransactionSummaryFetchRequest.php b/lib/Model/PaymentTerminalTransactionSummaryFetchRequest.php
index 5410f1c..4062142 100644
--- a/lib/Model/PaymentTerminalTransactionSummaryFetchRequest.php
+++ b/lib/Model/PaymentTerminalTransactionSummaryFetchRequest.php
@@ -114,7 +114,7 @@ class PaymentTerminalTransactionSummaryFetchRequest implements ModelInterface, A
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['format'] = isset($data['format']) ? $data['format'] : null;
diff --git a/lib/Model/PaymentTerminalTransactionSummaryReference.php b/lib/Model/PaymentTerminalTransactionSummaryReference.php
index 0eee04c..7faa37d 100644
--- a/lib/Model/PaymentTerminalTransactionSummaryReference.php
+++ b/lib/Model/PaymentTerminalTransactionSummaryReference.php
@@ -119,7 +119,7 @@ class PaymentTerminalTransactionSummaryReference implements ModelInterface, Arra
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/PaymentTerminalType.php b/lib/Model/PaymentTerminalType.php
index b2e45f5..ba99092 100644
--- a/lib/Model/PaymentTerminalType.php
+++ b/lib/Model/PaymentTerminalType.php
@@ -114,7 +114,7 @@ class PaymentTerminalType implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/Permission.php b/lib/Model/Permission.php
index dbf0ddd..f20fd97 100644
--- a/lib/Model/Permission.php
+++ b/lib/Model/Permission.php
@@ -154,7 +154,7 @@ class Permission implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/Refund.php b/lib/Model/Refund.php
index 838c636..10ade41 100644
--- a/lib/Model/Refund.php
+++ b/lib/Model/Refund.php
@@ -259,7 +259,7 @@ class Refund implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['amount'] = isset($data['amount']) ? $data['amount'] : null;
diff --git a/lib/Model/RefundBankTransaction.php b/lib/Model/RefundBankTransaction.php
index cc6dc7f..5e82b90 100644
--- a/lib/Model/RefundBankTransaction.php
+++ b/lib/Model/RefundBankTransaction.php
@@ -126,7 +126,7 @@ class RefundBankTransaction extends TransactionAwareEntity
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/RefundComment.php b/lib/Model/RefundComment.php
index aeeab47..d6ddd1b 100644
--- a/lib/Model/RefundComment.php
+++ b/lib/Model/RefundComment.php
@@ -149,7 +149,7 @@ class RefundComment implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['content'] = isset($data['content']) ? $data['content'] : null;
diff --git a/lib/Model/RefundCommentActive.php b/lib/Model/RefundCommentActive.php
index 669f1ad..5a6f998 100644
--- a/lib/Model/RefundCommentActive.php
+++ b/lib/Model/RefundCommentActive.php
@@ -101,7 +101,7 @@ class RefundCommentActive extends AbstractRefundCommentActive
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/RefundCommentCreate.php b/lib/Model/RefundCommentCreate.php
index 2492121..18046d0 100644
--- a/lib/Model/RefundCommentCreate.php
+++ b/lib/Model/RefundCommentCreate.php
@@ -96,7 +96,7 @@ class RefundCommentCreate extends AbstractRefundCommentActive
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/RefundCreate.php b/lib/Model/RefundCreate.php
index 409b9f8..51b5d40 100644
--- a/lib/Model/RefundCreate.php
+++ b/lib/Model/RefundCreate.php
@@ -134,7 +134,7 @@ class RefundCreate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['amount'] = isset($data['amount']) ? $data['amount'] : null;
diff --git a/lib/Model/RefundRecoveryBankTransaction.php b/lib/Model/RefundRecoveryBankTransaction.php
index 9e7e80c..bcbff3d 100644
--- a/lib/Model/RefundRecoveryBankTransaction.php
+++ b/lib/Model/RefundRecoveryBankTransaction.php
@@ -131,7 +131,7 @@ class RefundRecoveryBankTransaction extends TransactionAwareEntity
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/RenderedDocument.php b/lib/Model/RenderedDocument.php
index 46627ba..78673a8 100644
--- a/lib/Model/RenderedDocument.php
+++ b/lib/Model/RenderedDocument.php
@@ -119,7 +119,7 @@ class RenderedDocument implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['data'] = isset($data['data']) ? $data['data'] : null;
diff --git a/lib/Model/RenderedTerminalReceipt.php b/lib/Model/RenderedTerminalReceipt.php
index 8976834..e7b8e38 100644
--- a/lib/Model/RenderedTerminalReceipt.php
+++ b/lib/Model/RenderedTerminalReceipt.php
@@ -119,7 +119,7 @@ class RenderedTerminalReceipt implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['data'] = isset($data['data']) ? $data['data'] : null;
diff --git a/lib/Model/RenderedTerminalTransactionSummary.php b/lib/Model/RenderedTerminalTransactionSummary.php
index 0563f98..01df723 100644
--- a/lib/Model/RenderedTerminalTransactionSummary.php
+++ b/lib/Model/RenderedTerminalTransactionSummary.php
@@ -109,7 +109,7 @@ class RenderedTerminalTransactionSummary implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['data'] = isset($data['data']) ? $data['data'] : null;
diff --git a/lib/Model/RestAddressFormat.php b/lib/Model/RestAddressFormat.php
index 5509d3d..31d1335 100644
--- a/lib/Model/RestAddressFormat.php
+++ b/lib/Model/RestAddressFormat.php
@@ -119,7 +119,7 @@ class RestAddressFormat implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['post_code_examples'] = isset($data['post_code_examples']) ? $data['post_code_examples'] : null;
diff --git a/lib/Model/RestCountry.php b/lib/Model/RestCountry.php
index 91dcc07..b37ac23 100644
--- a/lib/Model/RestCountry.php
+++ b/lib/Model/RestCountry.php
@@ -129,7 +129,7 @@ class RestCountry implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['address_format'] = isset($data['address_format']) ? $data['address_format'] : null;
diff --git a/lib/Model/RestCountryState.php b/lib/Model/RestCountryState.php
index 6593ec9..0b49bea 100644
--- a/lib/Model/RestCountryState.php
+++ b/lib/Model/RestCountryState.php
@@ -124,7 +124,7 @@ class RestCountryState implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['code'] = isset($data['code']) ? $data['code'] : null;
diff --git a/lib/Model/RestCurrency.php b/lib/Model/RestCurrency.php
index 232f148..6b38a3d 100644
--- a/lib/Model/RestCurrency.php
+++ b/lib/Model/RestCurrency.php
@@ -119,7 +119,7 @@ class RestCurrency implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['currency_code'] = isset($data['currency_code']) ? $data['currency_code'] : null;
diff --git a/lib/Model/RestLanguage.php b/lib/Model/RestLanguage.php
index c238292..48d1204 100644
--- a/lib/Model/RestLanguage.php
+++ b/lib/Model/RestLanguage.php
@@ -134,7 +134,7 @@ class RestLanguage implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['country_code'] = isset($data['country_code']) ? $data['country_code'] : null;
diff --git a/lib/Model/Role.php b/lib/Model/Role.php
index d865617..7b6bd61 100644
--- a/lib/Model/Role.php
+++ b/lib/Model/Role.php
@@ -139,7 +139,7 @@ class Role implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['account'] = isset($data['account']) ? $data['account'] : null;
diff --git a/lib/Model/SalesChannel.php b/lib/Model/SalesChannel.php
index 78dc073..2987545 100644
--- a/lib/Model/SalesChannel.php
+++ b/lib/Model/SalesChannel.php
@@ -119,7 +119,7 @@ class SalesChannel implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/Scope.php b/lib/Model/Scope.php
index 4d2e955..5c9957b 100644
--- a/lib/Model/Scope.php
+++ b/lib/Model/Scope.php
@@ -159,7 +159,7 @@ class Scope implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['domain_name'] = isset($data['domain_name']) ? $data['domain_name'] : null;
diff --git a/lib/Model/ServerError.php b/lib/Model/ServerError.php
index a0a7778..7d58740 100644
--- a/lib/Model/ServerError.php
+++ b/lib/Model/ServerError.php
@@ -114,7 +114,7 @@ class ServerError implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['date'] = isset($data['date']) ? $data['date'] : null;
diff --git a/lib/Model/ShopifyRecurringOrder.php b/lib/Model/ShopifyRecurringOrder.php
index 74927e4..002392a 100644
--- a/lib/Model/ShopifyRecurringOrder.php
+++ b/lib/Model/ShopifyRecurringOrder.php
@@ -171,7 +171,7 @@ class ShopifyRecurringOrder extends TransactionAwareEntity
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ShopifyRecurringOrderUpdateRequest.php b/lib/Model/ShopifyRecurringOrderUpdateRequest.php
index 2b0e94a..c018e8c 100644
--- a/lib/Model/ShopifyRecurringOrderUpdateRequest.php
+++ b/lib/Model/ShopifyRecurringOrderUpdateRequest.php
@@ -109,7 +109,7 @@ class ShopifyRecurringOrderUpdateRequest implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['execution_date'] = isset($data['execution_date']) ? $data['execution_date'] : null;
diff --git a/lib/Model/ShopifySubscriber.php b/lib/Model/ShopifySubscriber.php
index 6b0ca1d..c867b65 100644
--- a/lib/Model/ShopifySubscriber.php
+++ b/lib/Model/ShopifySubscriber.php
@@ -154,7 +154,7 @@ class ShopifySubscriber implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['created_on'] = isset($data['created_on']) ? $data['created_on'] : null;
diff --git a/lib/Model/ShopifySubscriberActive.php b/lib/Model/ShopifySubscriberActive.php
index bb5ee37..f081fdd 100644
--- a/lib/Model/ShopifySubscriberActive.php
+++ b/lib/Model/ShopifySubscriberActive.php
@@ -129,7 +129,7 @@ class ShopifySubscriberActive implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/ShopifySubscriberCreation.php b/lib/Model/ShopifySubscriberCreation.php
index a4a3750..4679412 100644
--- a/lib/Model/ShopifySubscriberCreation.php
+++ b/lib/Model/ShopifySubscriberCreation.php
@@ -119,7 +119,7 @@ class ShopifySubscriberCreation implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['email_address'] = isset($data['email_address']) ? $data['email_address'] : null;
diff --git a/lib/Model/ShopifySubscription.php b/lib/Model/ShopifySubscription.php
index 40f0cca..3cf6f12 100644
--- a/lib/Model/ShopifySubscription.php
+++ b/lib/Model/ShopifySubscription.php
@@ -184,7 +184,7 @@ class ShopifySubscription implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['created_by'] = isset($data['created_by']) ? $data['created_by'] : null;
diff --git a/lib/Model/ShopifySubscriptionAddress.php b/lib/Model/ShopifySubscriptionAddress.php
index 22b7071..7803f16 100644
--- a/lib/Model/ShopifySubscriptionAddress.php
+++ b/lib/Model/ShopifySubscriptionAddress.php
@@ -96,7 +96,7 @@ class ShopifySubscriptionAddress extends Address
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ShopifySubscriptionAddressCreate.php b/lib/Model/ShopifySubscriptionAddressCreate.php
index 75919c6..61693a5 100644
--- a/lib/Model/ShopifySubscriptionAddressCreate.php
+++ b/lib/Model/ShopifySubscriptionAddressCreate.php
@@ -199,7 +199,7 @@ class ShopifySubscriptionAddressCreate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['city'] = isset($data['city']) ? $data['city'] : null;
diff --git a/lib/Model/ShopifySubscriptionCreationRequest.php b/lib/Model/ShopifySubscriptionCreationRequest.php
index 7231782..6c969e1 100644
--- a/lib/Model/ShopifySubscriptionCreationRequest.php
+++ b/lib/Model/ShopifySubscriptionCreationRequest.php
@@ -169,7 +169,7 @@ class ShopifySubscriptionCreationRequest implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['billing_address'] = isset($data['billing_address']) ? $data['billing_address'] : null;
diff --git a/lib/Model/ShopifySubscriptionProduct.php b/lib/Model/ShopifySubscriptionProduct.php
index cdd05b7..90d1251 100644
--- a/lib/Model/ShopifySubscriptionProduct.php
+++ b/lib/Model/ShopifySubscriptionProduct.php
@@ -254,7 +254,7 @@ class ShopifySubscriptionProduct implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['absolute_price_adjustment'] = isset($data['absolute_price_adjustment']) ? $data['absolute_price_adjustment'] : null;
diff --git a/lib/Model/ShopifySubscriptionProductCreate.php b/lib/Model/ShopifySubscriptionProductCreate.php
index 7d637d7..e77b217 100644
--- a/lib/Model/ShopifySubscriptionProductCreate.php
+++ b/lib/Model/ShopifySubscriptionProductCreate.php
@@ -116,7 +116,7 @@ class ShopifySubscriptionProductCreate extends AbstractShopifySubscriptionProduc
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ShopifySubscriptionProductUpdate.php b/lib/Model/ShopifySubscriptionProductUpdate.php
index 540954e..dbc9be4 100644
--- a/lib/Model/ShopifySubscriptionProductUpdate.php
+++ b/lib/Model/ShopifySubscriptionProductUpdate.php
@@ -101,7 +101,7 @@ class ShopifySubscriptionProductUpdate extends AbstractShopifySubscriptionProduc
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ShopifySubscriptionSuspension.php b/lib/Model/ShopifySubscriptionSuspension.php
index 7ccada6..a27563f 100644
--- a/lib/Model/ShopifySubscriptionSuspension.php
+++ b/lib/Model/ShopifySubscriptionSuspension.php
@@ -164,7 +164,7 @@ class ShopifySubscriptionSuspension implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['created_by'] = isset($data['created_by']) ? $data['created_by'] : null;
diff --git a/lib/Model/ShopifySubscriptionSuspensionCreate.php b/lib/Model/ShopifySubscriptionSuspensionCreate.php
index 4795a5a..78737e9 100644
--- a/lib/Model/ShopifySubscriptionSuspensionCreate.php
+++ b/lib/Model/ShopifySubscriptionSuspensionCreate.php
@@ -114,7 +114,7 @@ class ShopifySubscriptionSuspensionCreate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['planned_end_date'] = isset($data['planned_end_date']) ? $data['planned_end_date'] : null;
diff --git a/lib/Model/ShopifySubscriptionUpdateAddressesRequest.php b/lib/Model/ShopifySubscriptionUpdateAddressesRequest.php
index 906b63b..f99aade 100644
--- a/lib/Model/ShopifySubscriptionUpdateAddressesRequest.php
+++ b/lib/Model/ShopifySubscriptionUpdateAddressesRequest.php
@@ -114,7 +114,7 @@ class ShopifySubscriptionUpdateAddressesRequest implements ModelInterface, Array
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['billing_address'] = isset($data['billing_address']) ? $data['billing_address'] : null;
diff --git a/lib/Model/ShopifySubscriptionUpdateRequest.php b/lib/Model/ShopifySubscriptionUpdateRequest.php
index 2ab5f1c..e423f8e 100644
--- a/lib/Model/ShopifySubscriptionUpdateRequest.php
+++ b/lib/Model/ShopifySubscriptionUpdateRequest.php
@@ -124,7 +124,7 @@ class ShopifySubscriptionUpdateRequest implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['billing_configuration'] = isset($data['billing_configuration']) ? $data['billing_configuration'] : null;
diff --git a/lib/Model/ShopifySubscriptionVersion.php b/lib/Model/ShopifySubscriptionVersion.php
index 25a47bd..919834e 100644
--- a/lib/Model/ShopifySubscriptionVersion.php
+++ b/lib/Model/ShopifySubscriptionVersion.php
@@ -239,7 +239,7 @@ class ShopifySubscriptionVersion implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['billing_address'] = isset($data['billing_address']) ? $data['billing_address'] : null;
diff --git a/lib/Model/ShopifySubscriptionVersionItem.php b/lib/Model/ShopifySubscriptionVersionItem.php
index 15253ee..638f467 100644
--- a/lib/Model/ShopifySubscriptionVersionItem.php
+++ b/lib/Model/ShopifySubscriptionVersionItem.php
@@ -124,7 +124,7 @@ class ShopifySubscriptionVersionItem implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['price_including_tax'] = isset($data['price_including_tax']) ? $data['price_including_tax'] : null;
diff --git a/lib/Model/ShopifyTaxLine.php b/lib/Model/ShopifyTaxLine.php
index f49850a..9c462f8 100644
--- a/lib/Model/ShopifyTaxLine.php
+++ b/lib/Model/ShopifyTaxLine.php
@@ -124,7 +124,7 @@ class ShopifyTaxLine implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['fraction_rate'] = isset($data['fraction_rate']) ? $data['fraction_rate'] : null;
diff --git a/lib/Model/ShopifyTransaction.php b/lib/Model/ShopifyTransaction.php
index 9f98fa5..dab3ace 100644
--- a/lib/Model/ShopifyTransaction.php
+++ b/lib/Model/ShopifyTransaction.php
@@ -146,7 +146,7 @@ class ShopifyTransaction extends TransactionAwareEntity
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/ShopifyV1Integration.php b/lib/Model/ShopifyV1Integration.php
index c823209..eb87d22 100644
--- a/lib/Model/ShopifyV1Integration.php
+++ b/lib/Model/ShopifyV1Integration.php
@@ -219,7 +219,7 @@ class ShopifyV1Integration implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['additional_line_item_data'] = isset($data['additional_line_item_data']) ? $data['additional_line_item_data'] : null;
diff --git a/lib/Model/Space.php b/lib/Model/Space.php
index ccc6d8e..7bd5def 100644
--- a/lib/Model/Space.php
+++ b/lib/Model/Space.php
@@ -199,7 +199,7 @@ class Space implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['account'] = isset($data['account']) ? $data['account'] : null;
diff --git a/lib/Model/SpaceAddress.php b/lib/Model/SpaceAddress.php
index d30338f..0de2f41 100644
--- a/lib/Model/SpaceAddress.php
+++ b/lib/Model/SpaceAddress.php
@@ -174,7 +174,7 @@ class SpaceAddress implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['city'] = isset($data['city']) ? $data['city'] : null;
diff --git a/lib/Model/SpaceAddressCreate.php b/lib/Model/SpaceAddressCreate.php
index 66456a9..550c8d4 100644
--- a/lib/Model/SpaceAddressCreate.php
+++ b/lib/Model/SpaceAddressCreate.php
@@ -174,7 +174,7 @@ class SpaceAddressCreate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['city'] = isset($data['city']) ? $data['city'] : null;
diff --git a/lib/Model/SpaceCreate.php b/lib/Model/SpaceCreate.php
index 366b081..c98a3fb 100644
--- a/lib/Model/SpaceCreate.php
+++ b/lib/Model/SpaceCreate.php
@@ -101,7 +101,7 @@ class SpaceCreate extends AbstractSpaceUpdate
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/SpaceUpdate.php b/lib/Model/SpaceUpdate.php
index 9873413..5dd8fe1 100644
--- a/lib/Model/SpaceUpdate.php
+++ b/lib/Model/SpaceUpdate.php
@@ -101,7 +101,7 @@ class SpaceUpdate extends AbstractSpaceUpdate
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/SpaceView.php b/lib/Model/SpaceView.php
index 6d832dc..17c7ad4 100644
--- a/lib/Model/SpaceView.php
+++ b/lib/Model/SpaceView.php
@@ -134,7 +134,7 @@ class SpaceView implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/StaticValue.php b/lib/Model/StaticValue.php
index 3edfa9c..8f93e98 100644
--- a/lib/Model/StaticValue.php
+++ b/lib/Model/StaticValue.php
@@ -119,7 +119,7 @@ class StaticValue implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
diff --git a/lib/Model/Tax.php b/lib/Model/Tax.php
index ab85208..fdcd253 100644
--- a/lib/Model/Tax.php
+++ b/lib/Model/Tax.php
@@ -109,7 +109,7 @@ class Tax implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['rate'] = isset($data['rate']) ? $data['rate'] : null;
diff --git a/lib/Model/TaxCreate.php b/lib/Model/TaxCreate.php
index 50da490..a43e1bd 100644
--- a/lib/Model/TaxCreate.php
+++ b/lib/Model/TaxCreate.php
@@ -109,7 +109,7 @@ class TaxCreate implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['rate'] = isset($data['rate']) ? $data['rate'] : null;
diff --git a/lib/Model/Transaction.php b/lib/Model/Transaction.php
index e93fa30..e8c1556 100644
--- a/lib/Model/Transaction.php
+++ b/lib/Model/Transaction.php
@@ -449,7 +449,7 @@ class Transaction implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['accept_header'] = isset($data['accept_header']) ? $data['accept_header'] : null;
diff --git a/lib/Model/TransactionCreate.php b/lib/Model/TransactionCreate.php
index d1fd804..6871817 100644
--- a/lib/Model/TransactionCreate.php
+++ b/lib/Model/TransactionCreate.php
@@ -131,7 +131,7 @@ class TransactionCreate extends AbstractTransactionPending
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         parent::__construct($data);
 
diff --git a/lib/Model/TransactionGroup.php b/lib/Model/TransactionGroup.php
index 1f3305c..21f4cdb 100644
--- a/lib/Model/TransactionGroup.php
+++ b/lib/Model/TransactionGroup.php
@@ -139,7 +139,7 @@ class TransactionGroup implements ModelInterface, ArrayAccess
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(array $data = [])
     {
         
         $this->container['begin_date'] = isset($data['begin_date']) ? $data['begin_date'] : null;