presenceChannel method
Get a presence channel instance by name.
Implementation
@override
SocketIoPresenceChannel presenceChannel(String name) {
if (channels['presence-$name'] == null) {
channels['presence-$name'] = SocketIoPresenceChannel(
socket,
'presence-$name',
options,
);
}
return channels['presence-$name'] as SocketIoPresenceChannel;
}