(self, event)
Abstract method to handle a `ServerHeartbeatFailedEvent`.

        :Parameters:
          - `event`: An instance of :class:`ServerHeartbeatFailedEvent`.
Abstract method to handle a `ServerHeartbeatFailedEvent`.
Abstract method to handle a ServerHeartbeatFailedEvent .
def failed(self, event):
        """Abstract method to handle a `ServerHeartbeatFailedEvent`.

        :Parameters:
          - `event`: An instance of :class:`ServerHeartbeatFailedEvent`.
        """
        raise NotImplementedError
def failed ( self , event ) : raise NotImplementedError