code: function (index) {
          validateListIndex(this, index);
  
          var i = index,
              len = --this.length;
  
          for (; i < len; i++) {
              this[i] = this[i + 1];
          }
  
          delete this[len];
      }
docs: Removes the element at the specified index of the List.
  @param {Number} index The zero-based index of the element to remove.