code: def after_app_websocket(self, func: Callable) -> Callable:
          
          self.record_once(lambda state: state.app.after_websocket(func))
          return func
docs: Add an after websocket function to the App.
  
          This is designed to be used as a decorator, and has the same arguments
          as :meth:`~quart.Quart.after_websocket`. It applies to all requests to the
          ppe this blueprint is registerd on. An example usage,
  
          .. code-block:: python
  
              blueprint = Blueprint(__name__)
              @blueprint.after_app_websocket
              def after():
                  ...