Nestable\Services\NestableService::save PHP Метод

    public function save(array $params)
    {
        foreach ($params as $method => $param) {
            if (is_array($param) && isset($param[0])) {
                call_user_func_array([$this, $method], $param);
            } else {
                $this->{$method}($param);
            }
        }
    }

 /**
  * Pass data to nest methods.
  *
  * @return mixed
  */
 protected function to()
 {
     if (static::$to === 1) {
         $method = 'renderAsArray';
     } elseif (static::$to === 2) {
         $method = 'renderAsJson';
     } elseif (static::$to === 3) {
         $method = 'renderAsHtml';
     } elseif (static::$to === 4) {
         $method = 'renderAsDropdown';
     } else {
         return $this->source;
     }
     $nest = new NestableService();
     $nest->save(static::$parameters);
     $nestable = $nest->make($this->source);
     static::$nested = false;
     return call_user_func([$nestable, $method]);
 }