function getForm()
 {
     $form = new LaraForm($this->relation);
     $form->putTbHidden('relation')->setValue($this->relation);
     $method = \Str::camel('relation_' . $this->relation);
     $model = call_user_func([$this, $method]);
     $options = $model::orderBy($this->orderByModel())->listsExt();
     if (!is_array($options)) {
         $options = [];
     }
     $method = \Str::camel('empty_' . $this->relation);
     if (method_exists($this, $method)) {
         $empty = call_user_func([$this, $method]);
         $options = [0 => $empty] + $options;
     }
     $form->putTbGroupRadio('belongs_to', $options, false);
     $ids = $this->ids();
     $form->initValues(['belongs_to' => $ids]);
     return $form;
 }