# dispose method

1. @override

void dispose ()
inherited

Discards any resources used by the object. After this is called, the object is not in a usable state and should be discarded (calls to addListener and removeListener will throw after the object is disposed).

This method should only be called by the object's owner.

## Implementation

    @override
    void dispose() {
      _manager?._willDisposeFocusNode(this);
      _parent?._resignFocus(this);
      assert(_parent == null);
      assert(_manager == null);
      super.dispose();
    }