Elastica\Search::getQuery PHP Method

    public function getQuery()
    {
        if (null === $this->_query) {
            $this->_query = Query::create('');
        }
        return $this->_query;
    }

 /**
  * {@inheritDoc}
  *
  * @api
  */
 public function getItems($offset, $limit)
 {
     $query = $this->search->getQuery();
     $query->setFrom($offset);
     $query->setSize($limit);
     return $this->search->search()->getResults();
 }