splitPackages example

new LineItemQuantity('ABC', 2),
                new LineItemQuantity('DEF', 3),
            ]
        ));

        $package2 = new DiscountPackage(new LineItemQuantityCollection(
            [
                new LineItemQuantity('GHJ', 1),
            ]
        ));

        $splitted = (new DiscountPackageCollection([$package1, $package2]))->splitPackages();

        static::assertEquals(3, $splitted->count());

        $package1 = $splitted->getElements()[0];
        $package2 = $splitted->getElements()[1];
        $package3 = $splitted->getElements()[2];

        // now test the content of each package. only 1 item has to be in there         static::assertEquals(1, $package1->getMetaData()->count());
        static::assertEquals(1, $package2->getMetaData()->count());
        static::assertEquals(1, $package3->getMetaData()->count());
    }