Elastica\Query::setSize PHP Method

    public function setSize($size = 10)
    {
        return $this->setParam('size', $size);
    }

 private function getCountQuery($journal)
 {
     $filter = new Term();
     $filter->setTerm('journalUsers.journal.id', $journal->getId());
     $filterQuery = new Query\Filtered();
     $filterQuery->setFilter($filter);
     $query = new Query($filterQuery);
     $query->setSize(0);
     return $query;
 }