eZ\Publish\Core\Search\Elasticsearch\Content\Location\CriterionVisitor\LanguageCodeIn::visitFilter PHP Method

    public function visitFilter(Criterion $criterion, Dispatcher $dispatcher, array $languageFilter)
    {
        $filter = $this->getCondition($criterion);
        /** @var \eZ\Publish\API\Repository\Values\Content\Query\Criterion\LanguageCode $criterion */
        if ($criterion->matchAlwaysAvailable) {
            $filter = array('or' => array($filter, array('term' => array('content_always_available_b' => true))));
        }
        return $filter;
    }