*/
public PresenceChannel subscribePresence(String channelName, PresenceChannelEventListener listener, String... eventNames) {
throwExceptionIfNoAuthorizerHasBeenSet();
PresenceChannelImpl channel = factory.newPresenceChannel(connection, channelName, pusherOptions.getAuthorizer());
channelManager.subscribeTo(channel, listener, eventNames);
return channel;
}