Redacts the message with specified event_id for the given reason.

        See https://matrix.org/docs/spec/r0.0.1/client_server.html#id112

def redact_message(self, event_id, reason=None):
        """Redacts the message with specified event_id for the given reason.

        See https://matrix.org/docs/spec/r0.0.1/client_server.html#id112
        """
        return self.client.api.redact_event(self.room_id, event_id, reason)