Method demo

examples/demo.php:1383–1394

()

class GenericShapeDemo
{
    public function demo(): void
    {
        $src = new ScaffoldingGenericShape();

        // Template params inside array shape bodies are substituted through inheritance
        $result = $src->getResult();
        $result['data']->open();          // array{data: T} with T=Gift → Gift

        // Chained bracket access walks shape key then list element
        $first = $result['items'][0];
        $first->open();                   // list<T> with T=Gift → Gift
    }
}