Heartbeat interval in milliseconds. When set, the plugin schedules a repeating : heartbeat\n\n comment frame. Omit to disable (no timer created).

Reconnection time in milliseconds. When set, the first bytes on every new stream are retry: <ms> advertising the reconnect delay. Omit to send no retry: field.

Whether to log one info line at registration when no realtime backplane is registered, stating that channels broadcast in-process only. Defaults to true.

Set false to silence it — appropriate when you have decided single-replica fan-out is correct for this deployment and do not want the line on every startup. It suppresses only the message: channel delivery is unaffected either way, and the notice never appears once a backplane is registered.