* :method:`Symfony\\Component\\HttpFoundation\\Session\\Session::start`:

Starts the session - do not use ``session_start()``;

* :method:`Symfony\\Component\\HttpFoundation\\Session\\Session::migrate`:

Regenerates the session ID - do not use ``session_regenerate_id()``.

This method can optionally change the lifetime of the new cookie that will

be emitted by calling this method;

* :method:`Symfony\\Component\\HttpFoundation\\Session\\Session::invalidate`:

Clears all session data and regenerates session ID. Do not use ``session_destroy()``;

* :method:`Symfony\\Component\\HttpFoundation\\Session\\Session::getId`: Gets the

session ID. Do not use ``session_id()``;

* :method:`Symfony\\Component\\HttpFoundation\\Session\\Session::setId`: Sets the

session ID. Do not use ``session_id()``;

* :method:`Symfony\\Component\\HttpFoundation\\Session\\Session::getName`: Gets the

session name. Do not use ``session_name()``;

* :method:`Symfony\\Component\\HttpFoundation\\Session\\Session::setName`: Sets the

session name. Do not use ``session_name()``.

* :method:`Symfony\\Component\\HttpFoundation\\Session\\Session::set`:

Sets an attribute by key;

* :method:`Symfony\\Component\\HttpFoundation\\Session\\Session::get`:

Gets an attribute by key;

* :method:`Symfony\\Component\\HttpFoundation\\Session\\Session::all`:

Gets all attributes as an array of key => value;

* :method:`Symfony\\Component\\HttpFoundation\\Session\\Session::has`:

Returns true if the attribute exists;

* :method:`Symfony\\Component\\HttpFoundation\\Session\\Session::replace`:

Sets multiple attributes at once: takes a keyed array and sets each key => value pair;

* :method:`Symfony\\Component\\HttpFoundation\\Session\\Session::remove`:

Deletes an attribute by key;

* :method:`Symfony\\Component\\HttpFoundation\\Session\\Session::clear`:

Clear all attributes.

* :method:`Symfony\\Component\\HttpFoundation\\Session\\Session::registerBag`:

Registers a :class:`Symfony\\Component\\HttpFoundation\\Session\\SessionBagInterface`;

* :method:`Symfony\\Component\\HttpFoundation\\Session\\Session::getBag`:

Gets a :class:`Symfony\\Component\\HttpFoundation\\Session\\SessionBagInterface` by

bag name;

* :method:`Symfony\\Component\\HttpFoundation\\Session\\Session::getFlashBag`:

Gets the :class:`Symfony\\Component\\HttpFoundation\\Session\\Flash\\FlashBagInterface`.

This is just a shortcut for convenience.

* :method:`Symfony\\Component\\HttpFoundation\\Session\\Session::getMetadataBag`:

Gets the :class:`Symfony\\Component\\HttpFoundation\\Session\\Storage\\MetadataBag`

which contains information about the session.