Registry::getUserFieldEntityIdByItemEntity

public function getUserFieldEntityIdByItemEntity(Entity $entity): ?string
{
	$type = $this->getTypeByEntity($entity);
	if($type && $type['code'])
	{
		$factory = $this->getFactoryByCode($type['code']);
		if($factory)
		{
			return $factory->getUserFieldEntityId($type['ID']);
		}
	}

	return null;
}