protected function performDeleteOnModel(Descriptor $descriptor)
 {
     return $descriptor->deleteOneAsync($this->getKey());
 }
 /**
  * Create a new relation instance.
  *
  * @param Descriptor $descriptor
  * @param Model $parent
  */
 public function __construct($descriptor, $parent)
 {
     $this->descriptor = $descriptor;
     $this->parent = $parent;
     $this->related = $descriptor->getModel();
 }