Nextras\Orm\Collection\ICollection::orderBy PHP Method

    public function orderBy($column, $direction = self::ASC);

 protected function applyDefaultOrder(ICollection $collection)
 {
     if ($this->metadata->relationship->order !== NULL) {
         return $collection->orderBy($this->metadata->relationship->order[0], $this->metadata->relationship->order[1]);
     } else {
         return $collection;
     }
 }