code: public static function parseJSON($method, array $args)
      {
          $body = call_user_func_array([self::class, $method], $args);
          if ($body instanceof ResponseInterface) {
              $body = $body->getBody();
          }
  
          if (empty($body)) {
              return false;
          }
  
          $contents = $body->getContents();
          $res = json_decode($contents, true);
  
          if (JSON_ERROR_NONE !== json_last_error()) {
              return false;
          }
  
          return $res;
      }
docs: 解析json字符串
  @param       $method
  @param array $args
  @return bool|mixed