text: define(function () {
  
      /**
       * Array lastIndexOf
       */
      function lastIndexOf(arr, item, fromIndex) {
          var len = arr.length;
          fromIndex = (fromIndex == null || fromIndex >= len)? len - 1 : fromIndex;
          fromIndex = (fromIndex < 0)? len + fromIndex : fromIndex;
          while (fromIndex >= 0) {
              // we iterate over sparse items since there is no way to make it
              // work properly on IE 7-8. see #64
              if (arr[fromIndex] === item) {
                  return fromIndex;
              }
              fromIndex--;
          }
          return -1;
      }
  
      return lastIndexOf;
  });
  