Neos\Flow\Persistence\Doctrine\Query::getQueryBuilder PHP Method

    public function getQueryBuilder()
    {
        return $this->queryBuilder;
    }

 /**
  * @var Query $query
  * @return QueryInterface
  */
 protected function addImageVariantFilterClause(Query $query)
 {
     $queryBuilder = $query->getQueryBuilder();
     $queryBuilder->andWhere('e NOT INSTANCE OF Neos\\Media\\Domain\\Model\\ImageVariant');
     return $query;
 }