code: function (items) {
          removeEventListener(items, 'dragstart');
          removeEventListener(items, 'dragend');
          removeEventListener(items, 'dragover');
          removeEventListener(items, 'dragenter');
          removeEventListener(items, 'drop');
          removeEventListener(items, 'mouseenter');
          removeEventListener(items, 'mouseleave');
      }
docs: remove event handlers from items
  @param {Array|NodeList} items