public function getCollectionNames() {

        $stmt   = $this->connection->query("SELECT name FROM sqlite_master WHERE type='table' AND name!='sqlite_sequence';");
        $tables = $stmt->fetchAll( \PDO::FETCH_ASSOC);
        $names  = [];

        foreach ($tables as $table) {
            $names[] = $table['name'];
        }

        return $names;
    }