CompanyDataProvider::getFieldName

protected function getFieldName($fieldID)
{
	$name = Loc::getMessage('CRM_COMPANY_FILTER_' . $fieldID);
	if($name === null)
	{
		$name = \CCrmCompany::GetFieldCaption($fieldID);
	}
	if (!$name && ParentFieldManager::isParentFieldName($fieldID))
	{
		$parentEntityTypeId = ParentFieldManager::getEntityTypeIdFromFieldName($fieldID);
		$name = \CCrmOwnerType::GetDescription($parentEntityTypeId);
	}

	return $name;
}