subscribe method
Subscribes to the channel.
Implementation
void subscribe([bool force = false]) async {
if (!client.connected ||
(subscribed && !force) ||
client.socketId == null) {
return;
}
_subscribed = false;
options.log("SUBSCRIBE", name);
client.sendEvent("pusher:subscribe", {"channel": name});
if (isPublic) _subscribed = true;
}