docs: function isReactElement(suspectedElement) {
      var isElem = false;
      if (React.isValidElement(suspectedElement)) {
          isElem = true;
      } else if (Array.isArray(suspectedElement)) {
          for (var i = 0, l = suspectedElement.length; i < l; i++) {
              if (React.isValidElement(suspectedElement[i])) {
                  isElem = true;
                  break;
              }
          }
      }
      return isElem;
  }