def _store(self, message_key: str, result: Result, ttl: int) -> None:  # pragma: no cover
        """Store a result in the backend.  Subclasses may implement
        this method if they want to use the default implementation of
        set_result.
        """
        raise NotImplementedError("%(classname)r does not implement _store()" % {
            "classname": type(self).__name__,
        })
def _store ( self , message_key : str , result : Result , ttl : int ) -> None : raise NotImplementedError ( "%(classname)r does not implement _store()" % { "classname" : type ( self ) . __name__ , } )
Store a result in the backend.  Subclasses may implement
        this method if they want to use the default implementation of
        set_result.