LeadDataProvider::getFieldName

protected function getFieldName($fieldID)
{
	$name = Loc::getMessage("CRM_LEAD_FILTER_{$fieldID}");
	if($name === null)
	{
		$name = Loc::getMessage("CRM_LEAD_FILTER_{$fieldID}_MSGVER_1");
	}

	if($name === null)
	{
		$name = \CCrmLead::GetFieldCaption($fieldID);
	}
	if (!$name && ParentFieldManager::isParentFieldName($fieldID))
	{
		$parentEntityTypeId = ParentFieldManager::getEntityTypeIdFromFieldName($fieldID);
		$name = \CCrmOwnerType::GetDescription($parentEntityTypeId);
	}

	return $name;
}