docs: def publish_server_heartbeat_started(self, connection_id):
          """Publish a ServerHeartbeatStartedEvent to all server heartbeat
          listeners.
  
          :Parameters:
           - `connection_id`: The address (host/port pair) of the connection.
          """
          event = ServerHeartbeatStartedEvent(connection_id)
          for subscriber in self.__server_heartbeat_listeners:
              try:
                  subscriber.started(event)
              except Exception:
                  _handle_exception()