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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def after_this_websocket(func: Callable) -> Callable: """Schedule the func to be called after the current websocket. This is useful in situations whereby you want an after websocket function for a specific route or circumstance only, for example, .. note:: The response is an optional argument, and will only be passed if the websocket was not active (i.e. there was an error). .. code-block:: python def index():
 @after_this_websocket def set_cookie(response: Optional[Response]):
 response.set_cookie('special', 'value') return response """

    _websocket_ctx_stack.top._after_websocket_functions.append(func)
    return func