How to access Symfony Plugin source provider?

[havvg]

I got the Toolbox and the Symfony plugin installed.

{
    "registrar": [{
        "language": "php",
        "provider": "template",
        "signature": [
            "Application\\Bundle\\AppBundle\\View\\RenderResult::__construct"
        ]
    }]
}

I want to make use of the Twig template naming provider, within the Symfony plugin it's called template however it's not working when used on a __construct, thought I could make it work this way around.

[Haehnchen]

symfony plugin update follows