Group::getSiteIdByGroupId

static function getSiteIdByGroupId(int $groupId): ?int
{
	$res = BindingTable::getList([
		'select' => [
			'ENTITY_ID',
		],
		'filter' => [
			'=BINDING_TYPE' => self::$bindingType,
			'=BINDING_ID' => $groupId,
			'=ENTITY_TYPE' => self::ENTITY_TYPE_SITE,
		],
	]);

	return $res->fetch()['ENTITY_ID'] ?? null;
}