docs: function() {
        return elementArrayFinder.getWebElements().then(function(webElements) {
          if (webElements.length === 0) {
            throw new webdriver.error.Error(
                webdriver.error.ErrorCode.NO_SUCH_ELEMENT,
                'No element found using locator: ' +
                    elementArrayFinder.locator_.toString());
          } else {
            if (webElements.length > 1) {
              console.log('warning: more than one element found for locator ' +
                  elementArrayFinder.locator_.toString() +
                  ' - you may need to be more specific');
            }
            return [webElements[0]];
          }
        });
      }