fix: make onMouseWheel free

Author: aminya

lib/datatip-manager.ts

@@ -297,14 +297,6 @@ export class DataTipManager {
     )
   }
 
-  /**
-   * handles the mouse wheel event to enable scrolling over long text
-   * @param evt the mouse wheel event being triggered
-   */
-  onMouseWheel(evt: WheelEvent) {
-    evt.stopPropagation()
-  }
-
   /**
    * the central command event handler
    * @param evt command event
@@ -497,7 +489,7 @@ export class DataTipManager {
     }
 
     // TODO move this code to atom-ide-base
-    element.addEventListener("wheel", this.onMouseWheel, { passive: true })
+    element.addEventListener("wheel", onMouseWheel, { passive: true })
 
     return disposables
   }
@@ -511,3 +503,11 @@ export class DataTipManager {
     this.dataTipMarkerDisposables = null
   }
 }
+
+/**
+ * handles the mouse wheel event to enable scrolling over long text
+ * @param evt the mouse wheel event being triggered
+ */
+function onMouseWheel(evt: WheelEvent) {
+  evt.stopPropagation()
+}