@Override
    public void transferToGroup(String group, IoBuffer head, IoBuffer tail, FileChannel channel, long position,
            long size, Integer opaque, SingleRequestCallBackListener listener, long time, TimeUnit unit)
                    throws NotifyRemotingException {
        this.remotingClient.transferToGroup(group, head, tail, channel, position, size, opaque, listener, time, unit);

    }
Whether to enable loopback connection for metaq client, default is false.
metamorphosis-client/src/main/java/com/taobao/metamorphosis/client/RemotingClientWrapper.java