code: def _notify_disconnected(self):
          ''' Called by the ClientConnection we are using to notify us of disconnect.
  
          '''
          if self.document is not None:
              self.document.remove_on_change(self)
              self._callbacks.remove_all_callbacks(f _notify_disconnected(self):
          ''' Called by the ClientConnection we are using to notify us of disconnect.
  
          '''
          if self.document is not None:
              self.document.remove_on_change(self)
              self._callbacks.remove_all_callbacks()
docs: Called by the ClientConnection we are using to notify us of disconnect.