def add_subscriber_to_channel(channel, message)
      registry_channels = CelluloidPubsub::Registry.channels
      @channels << channel
      registry_channels << channel unless registry_channels.include?(channel)
      @server.mutex.synchronize do
        @server.subscribers[channel] = channel_subscribers(channel).push(reactor: Actor.current, message: message)
      end
    end
def add_subscriber_to_channel(channel, message)
      registry_channels = CelluloidPubsub::Registry.channels
      @channels << channel
      registry_channels << channel unless registry_channels.include?(channel)
      @server.mutex.synchronize do
        @server.subscribers[channel] = channel_subscribers(channel).push(reactor: Actor.current, message: message)
      end
    end
adds the curent actor the list of the subscribers for a particular channel
 and registers the new channel

 @param [String] channel
 @param [Object] message

 @return [void]

 @api public