getMetadataBag() {@inheritdoc}

mixed driver(string $driver = null) Get a driver instance.

clear() {@inheritdoc}

SessionHandlerInterface getHandler()

isStarted() {@inheritdoc}

void now(string $key, mixed $value) Flash a key / value pair to the session

FileSessionHandler class FileSessionHandler implements

read($sessionId) {@inheritdoc} Parameters

void keep(array|mixed $keys = null) Reflash a subset of the current flash

void error(string $string, null|int|string $verbosity = null) Write a string