PropertyVariant::updateAction

public function updateAction($id, array $fields): ?array
{
	$variant = new CSaleOrderPropsVariant();

	$r = $this->exists($id);
	if($r->isSuccess())
	{
		if(empty($fields) == false)
		{
			if(!$variant->Update($id, $fields))
			{
				if ($ex = self::getApplication()->GetException())
				{
					$r->addError(new Error($ex->GetString(), $ex->GetID()));
				}
				else
				{
					$r->addError(new Error('variant update error', 201550000004));
				}
			}
		}
	}

	if($r->isSuccess())
	{
		return ['PROPERTY_VARIANT'=>$this->get($id)];
	}
	else
	{
		$this->addErrors($r->getErrors());
		return null;
	}
}