def on_message(self, headers, body):
        # reset the heartbeat for any received message
        self.received_heartbeat = monotonic()
Basic formattable event passes the format along correctly.
dataset/ETHPy150Open jasonrbriggs/stomp.py/stomp/listener.py/HeartbeatListener.on_message--crossover with--dataset/ETHPy150Open twisted/twisted/twisted/logger/test/test_stdlib.py/STDLibLogObserverTests.test_basicFormat