code: protected static void checkNotNegativeInteger(String configKey, int configValue) throws SofaRpcRuntimeException {
          if (configValue < 0) {
              throw ExceptionUtils.buildRuntime(configKey, configValue + "", "must >= 0");
          }
      }
docs: 检查数字是否为非负数（>=0)
  
  @param configKey   配置项
  @param configValue 配置值
  @throws SofaRpcRuntimeException 非法异常