Method demo

examples/demo.php:628–635

()

class TraitGenericDemo
{
    public function demo(): void
    {
        Product::factory()->create();             // @use HasFactory<UserFactory> → UserFactory
        Product::factory()->count(5)->make();     // count() returns static, make() returns Product

        $idx = new PenIndex();                    // @use Indexable<int, Pen>
        $idx->get()->write();                     // TValue → Pen
    }
}