CCrmEntitySelectorHelper::getPhoneCountryList

static function getPhoneCountryList(string $entityId, int $elementId): array
{
	$multiFieldIds = [];
	$dbResultIds = CCrmFieldMulti::GetList(['ID' => 'asc'], ['ENTITY_ID' => $entityId, 'ELEMENT_ID' => $elementId]);
	while ($row = $dbResultIds->fetch())
	{
		$multiFieldIds[] = (int)$row['ID'];
	}

	return CCrmFieldMulti::GetPhoneCountryList($multiFieldIds);
}