BaseForm::isCustomLinkProperty

private function isCustomLinkProperty(array $property): bool
{
	if (!isset($property['USER_TYPE']))
	{
		return false;
	}

	$userTypes = [
		CIBlockPropertyXmlID::USER_TYPE,
		CIBlockPropertyElementAutoComplete::USER_TYPE,
		'employee',
		CIBlockPropertySKU::USER_TYPE,
	];

	return in_array($property['USER_TYPE'], $userTypes, true);
}