/**
* Set the cart to store in the current session.
*
* @param Cart|null The cart to store in session
*
* @return $this
*/
public function setSessionCart(Cart $cart = null)
{
if (null === $cart || $cart->isNew()) {
self::$transientCart = $cart;
$this->remove("thelia.cart_id");
} else {
self::$transientCart = null;
$this->set("thelia.cart_id", $cart->getId());
}
return $this;
}