FileUserType::onBeforeCopy

static function onBeforeCopy(array $userField, int $newEntityId, $attachedIds, $entityObject, $userId = false)
{
	$attachedIds = $attachedIds ?: [];
	if (!$attachedIds)
	{
		return [];
	}

	$userId = (($userId === false) ? self::getActivityUserId() : $userId);
	$userFieldManager = Driver::getInstance()->getUserFieldManager();

	return $userFieldManager->cloneUfValuesFromAttachedObject($attachedIds, $userId);
}