RestManager::getZone

private function getZone()
{
	if (MainModuleManager::isModuleInstalled('bitrix24'))
	{
		$zone = CBitrix24::getPortalZone();
	}
	else
	{
		$iterator = MainLocalizationLanguageTable::getList([
			'select' => ['ID'],
			'filter' => ['=DEF' => 'Y', '=ACTIVE' => 'Y']
		]);
		$row = $iterator->fetch();
		$zone = $row['ID'];
	}

	return $zone;
}