Illuminate\Support\Collection::sortByDesc PHP Method

    public function sortByDesc($callback, $options = SORT_REGULAR)
    {
        return $this->sortBy($callback, $options, true);
    }

 /**
  * @return Collection
  */
 public function getCategories()
 {
     $set = $this->categories->sortByDesc(function (CategoryModel $category) {
         return $category->spent;
     });
     return $set;
 }