ScriptEditorContext.subscribeDragLeaveEvent Method
        
 Subscribe a event handler for drag leave event.
 
         
        Parameters
        
            - callback
            
 
            - 
                
Type: Function
A function to subscribe as a handler for the event. 
            - unsubscribe
            
 
            - 
                
Type: Boolean - May be null
(Optional) True to unsubscribe a handler. 
            - once
            
 
            - 
                
Type: Boolean - May be null
(Optional) True to subscribe a one time handler.