code: public Map<String, T> getMuiltServiceClients() {
  		if (this.thriftConnection instanceof MulitServiceThriftConnecion) {
  			MulitServiceThriftConnecion<T> connection = (MulitServiceThriftConnecion<T>) thriftConnection;
  			return connection.getMuiltServiceClients();
  		}
  		throw new IllegalStateException("单服务运行模式下不允许调用该方法");
  	}
docs: 获取多服务模式下所有thrift客户端的方法
  
  @return 多服务下所有thrift客户端集合