PropertyCollection::saveInternal

public function saveInternal(): Result
{
	$result = new Result();

	// ToDo make lazyLoad for getPropertyCollection() to not load collection everytime
	if ($this->isChanged())
	{
		// ToDo re-initialize saved ids from database after file save - check in CIBlockElement::SetPropertyValues
		// property collection can't be saved one by one, all simultaneously
		$res = $this->repository->save(...$this->getIterator());

		if ($res->isSuccess())
		{
			$this->clearChanged();
		}
		else
		{
			$result->addErrors($res->getErrors());
		}
	}

	return $result;
}