docs: function genFunctionProxy(serviceName, methodName, origin, attach, proxyCB) {
      // logger.debug('rpc proxy genFunctionProxy serviceName : %s,methodName :%s', serviceName, methodName);
      return (() => {
          const proxy = (...args) => {
              logger.debug('rpc proxy args : %j', args);
              proxyCB(serviceName, methodName, args, attach);
          };
          proxy.toServer = (...args) => {
              logger.debug('rpc proxy toServer  args : %j', args);
              proxyCB(serviceName, methodName, args, attach, true);
          };
          return proxy;
      })();
  }