ParameterCascadingHierarchyPicker.subscribeDisposedEvent Method
        
 Subscribe a handler for the disposed event.
 
         
        Parameters
        
            - handler
            
 
            - 
                
Type: Function
The handler to subscribe or unsubscribe with. 
            - remove
            
 
            - 
                
Type: Boolean
(Optional) True to unsubscribe.
Optional: True