bool has(string $type) Has flash messages for a given type?

bool regenerate(bool $destroy = false, int $lifetime = null) Regenerates id that represents this

clear() Clears all attributes.

string getStorageKey() Gets the storage key for this bag.

string getName() Gets this bag's name.

MetadataBag

string getName() Gets this bag's name.

setName($name) Parameters $name

replace(array $attributes) Sets attributes.

SessionBagInterface