src/Cart/ShoppingCart.php
public function setCurrent(Order $cart)
    {
        if (!$cart->IsCart()) {
            trigger_error('Passed Order object is not cart status', E_ERROR);
        }
        $this->order = $cart;
        $session = ShopTools::getSession();
        $session->set(self::config()->cartid_session_name, $cart->ID);

        return $this;
    }
public function setCurrent(Order $cart)
    {
        if (!$cart->IsCart()) {
            trigger_error('Passed Order object is not cart status', E_ERROR);
        }
        $this->order = $cart;
        $session = ShopTools::getSession();
        $session->set(self::config()->cartid_session_name, $cart->ID);

        return $this;
    }
Set the current cart

@param Order $cart the Order to use as the current cart-content

@return ShoppingCart