#[Parameter]: throw if not set without default value

[vrana]

• new feature
• BC break? yes
• doc PR: n/a

I have this property:

	#[Parameter]
	public string $code;

If there's no ?code= in URL and I access $this->code then PHP dies with this fatal error:

Typed property Presenter::$code must not be accessed before initialization

I would prefer to behave it the same way as if there's a missing parameter with render(int $code) which is to throw InvalidArgumentException.