code: protected SofaResponse doInvokeSync(SofaRequest request, int timeoutMillis)
          throws InvocationTargetException, IllegalAccessException {
          SofaResponse response = new SofaResponse();
          Method method = getMethod(request);
          if (method == null) {
              throw new SofaRpcException(RpcErrorType.CLIENT_UNDECLARED_ERROR,
                  "Not found method :" + request.getInterfaceName() + "." + request.getMethodName());
          }
          Object o = method.invoke(proxy, request.getMethodArgs());
          response.setAppResponse(o);
          return response;
      }
docs: 同步调用
  
  @param request       请求对象
  @param timeoutMillis 超时时间（毫秒）
  @return 返回对象
  @throws InvocationTargetException 反射调用异常
  @since 5.2.0