save() Force the session to be saved and closed. This method is generally not required for

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

add(string $type, string $message) Adds a flash message for type.

int count() Returns the number of attributes.

destroy($sessionId) {@inheritdoc} Parameters

save() Force the session to be saved and closed. This method must invoke sessionwriteclose()

bool has(string $name) Checks if an attribute is defined.

array all() Gets and clears flashes from the stack.

setId(string $id) Sets the session ID. Parameters

bool has(string $name) Checks if an attribute is defined.