src/Helper/LanguageSwitcherHelper.php
public function getQueryString()
    {
        $qs = Request::normalizeQueryString($this->requestStack->getCurrentRequest()->server->get('QUERY_STRING'));

        return '' === $qs ? null : $qs;
    }
public function getQueryString()
    {
        $qs = Request::normalizeQueryString($this->requestStack->getCurrentRequest()->server->get('QUERY_STRING'));

        return '' === $qs ? null : $qs;
    }
public function getQueryString ( ) { $ qs = Request :: normalizeQueryString ( $ this -> requestStack -> getCurrentRequest ( ) -> server -> get ( 'QUERY_STRING' ) ) ; return '' === $ qs ? null : $ qs ; }
Get the query string parameters for the current request
Not used at present.

@return null|string
Get the query string parameters for the current request Not used at present .