SharingConference::getConferenceChatIdByAlias

private function getConferenceChatIdByAlias(string $alias): ?int
{
	$aliasInfo = BitrixImModelAliasTable::query()
		->setSelect(['*'])
		->where('ALIAS', $alias)
		->where('ENTITY_TYPE', self::CONFERENCE_TYPE)
		->exec()->fetch()
	;

	if (!$aliasInfo)
	{
		return null;
	}

	return (int)$aliasInfo['ENTITY_ID'];
}