Jackalope\Transport\Jackrabbit\Client::getSupportedQueryLanguages PHP Method

    public function getSupportedQueryLanguages()
    {
        return array(QueryInterface::JCR_SQL2, QueryInterface::JCR_JQOM, QueryInterface::XPATH, QueryInterface::SQL);
    }

 /**
  * {@inheritDoc}
  */
 public function getSupportedQueryLanguages()
 {
     return $this->transport->getSupportedQueryLanguages();
 }