alvarocastro/ember-draggable-modifiers

<li
  {{sortable-item data=(hash item=@item parent=@parent) onDrop=@onDrop}}
  class="list-group-item"
>
  {{@item.name}}
  {{#if @item.childs}}
  <ul class="list-group mb-3">
    {{#each @item.childs as |child|}}
      <Examples::NestedLists::TreeItem
        @item={{child}}
        @parent={{@item}}
        @onDrop={{@onDrop}}
      />
    {{/each}}
  </ul>
  {{/if}}
</li>