code: function()
  		{
  			var nativeListeners = this.getCustomData( '_cke_nativeListeners' );
  			for ( var eventName in nativeListeners )
  			{
  				var listener = nativeListeners[ eventName ];
  				if ( this.$.detachEvent )
  					this.$.detachEvent( 'on' + eventName, listener );
  				else if ( this.$.removeEventListener )
  					this.$.removeEventListener( eventName, listener, false );
  
  				delete nativeListeners[ eventName ];
  			}
  		}
docs: Removes any listener set on this object.
  To avoid memory leaks we must assure that there are no
  references left after the object is no longer needed.