Jackalope\Query\QueryResult::getColumnNames PHP Method

    public function getColumnNames()
    {
        $columnNames = array();
        foreach ($this->rows as $row) {
            foreach ($row as $columns) {
                if ('jcr:path' !== substr($columns['dcr:name'], -8) && 'jcr:score' !== substr($columns['dcr:name'], -9)) {
                    // skip the meta information path and score that is also in the raw result table
                    $columnNames[] = $columns['dcr:name'];
                }
            }
        }
        return array_unique($columnNames);
    }