code: function getPlaceholderElement() {
          var placeholder;
          angular.forEach(element.children(), function(childNode) {
            var child = angular.element(childNode);
            if (child.hasClass('dndPlaceholder')) {
              placeholder = child;
            }
          });
          return placeholder || angular.element("<li class='dndPlaceholder'></li>");
        }
docs: Tries to find a child element that has the dndPlaceholder class set. If none was found, a
  new li element is created.