nulling a movieclip made from a class - does it make it trashable?

You have to both remove MyClip from the stage and also make it null to make the object that has the functions that are being used as event listeners available for garbage collection.

For example:

public class Obj1 {      protected var _obj2:Obj2;      public function get obj2():Obj2 {           return _obj2;      }      public function set obj2(value:Obj2):void {           if (value != _obj2) {                //should do this so the event listeners don't fire after obj2 nulled in larger context                if (_obj2) {                     _obj2.child.removeEventListener('someEvent', listener);                }                _obj2 = value;                if (_obj2) {                     _obj2.child.addEventListener('someEvent', listener);                }           }      }      protected function listener(e:Event):void {           //do something      } }

public class MainClass {          protected var _obj1:Obj1;      protected var _obj2:Obj2; ...      protected function init():void {               _obj2 = new Obj2();           addChild(_obj2);           _obj1 = new Obj1();           _obj1.obj2 = _obj2;      }      protected function tearDown():void {           removeChild(_obj2);           _obj2 = null;           //if you don't null _obj1.obj2, the listener will keep firing until it is garbage collected           //but obj1 will eventually get garbage collected           _obj1=null;      } }