@Override
        public void appendPayload(ByteArrayDataOutput out) {
            out.writeUTF(this.serverName);
        }
Accepts the incoming data, and returns true if this callback should now be de-registered

@param receiver the player instance which received the data
@param in the input data
@return if the callback should be de-registered
helper/src/main/java/me/lucko/helper/messaging/bungee/BungeeCordImpl.java