Requisite::getDocumentLanguageTitles

protected function getDocumentLanguageTitles()
{
	if($this->documentTitles === null)
	{
		$documentRegion = $this->getDocumentCountryId();
		if($documentRegion == $this->getInterfaceCountryId())
		{
			$this->documentTitles = $this->getInterfaceLanguageTitles();
		}
		else
		{
			$this->documentTitles = EntityRequisite::getSingleInstance()->getFieldsTitles($documentRegion);
		}
	}

	return $this->documentTitles;
}