string getClientOriginalExtension() Returns the original file extension. It is extracted

matchIp(string $ip) Adds a check for the client IP.

bool isCacheable() Returns true if the response is worth caching under any circumstance.

bool isStarted() Checks if the session is started.

JsonResponse setJson(string $json)

bool hasPreviousSession() Whether the request contains a Session which was started in one of

static enableHttpMethodParameterOverride() Enables support for the _method request

stampNew(int $lifetime = null) Stamps a new session's metadata.

string getName() Gets the name of the cookie.

ArrayIterator getIterator()