heartbeat_interval (nsqd 0.2.19+) milliseconds between heartbeats.

        Valid range: 1000 <= heartbeat_interval <= configured_max (-1 disables 
        heartbeats)

        --max-heartbeat-interval (nsqd flag) controls the max

        Defaults to --client-timeout / 2

def heartbeat_interval(self, heartbeat_interval_ms):
        """heartbeat_interval (nsqd 0.2.19+) milliseconds between heartbeats.

        Valid range: 1000 <= heartbeat_interval <= configured_max (-1 disables 
        heartbeats)

        --max-heartbeat-interval (nsqd flag) controls the max

        Defaults to --client-timeout / 2
        """

        assert issubclass(heartbeat_interval_ms.__class__, int)

        return self.__push('heartbeat_interval', heartbeat_interval_ms)