Method demo

examples/demo.php:1369–1375

()

class GenericContextDemo
{
    public function demo(): void
    {
        $src = new ScaffoldingGenericContext();

        $src->chest->unwrap()->open();             // Box<Gift>::unwrap() → Gift
        $src->display()->first()->open();          // TypedCollection<int, Gift>::first() → Gift
    }
}