src/Viserio/Component/Session/Handler/PdoSessionHandler.php
private function getConnection(): PDO
    {
        if ($this->pdo === null) {
            $this->connect($this->dsn);
        }

        return $this->pdo;
    }
private function getConnection(): PDO
    {
        if ($this->pdo === null) {
            $this->connect($this->dsn);
        }

        return $this->pdo;
    }
Return a PDO instance.

@return \PDO