trigger method
Implementation
void trigger({
required String channelName,
required String eventName,
dynamic data,
}) {
connection.sendEvent(
// client events should have the 'client-' prefix'
// refs: https://pusher.com/docs/channels/library_auth_reference/pusher-websockets-protocol/#triggering-channel-client-events
'client-$eventName',
data,
channelName: channelName,
);
}