public virtual ActionResult MultipleRemoveAsChild(int parentId, int[] IDs, int?userId, int?groupId) => JsonMessageResult(ChildContentService.MultipleRemove(parentId, IDs, userId, groupId));
 public virtual ActionResult MultipleRemoveAsChild(int parentId, [FromBody] SelectedItemsViewModel model, int?userId, int?groupId)
 {
     return(JsonMessageResult(ChildContentService.MultipleRemove(parentId, model.Ids, userId, groupId)));
 }