[Twig] Go to function definition does not work when using the first-class callable syntax

[stof]

class TestExtension extends AbstractExtension
{
    public function getFunctions(): array
    {
        return [
            new TwigFunction('legacy_fn', [$this, 'testFn']),
            new TwigFunction('modern_fn', $this->testFn(...)),
        ];
    }

    public function testFn(): string
    {
        return 'test';
    }
}

{% set a = legacy_fn() %}
{% set b = modern_fn() %}

Clicking on legacy_fn in the Twig template brings me to the testFn method of the TestExtension defining the implementation of legacy_fn. But clicking on modern_fn does not do it.

[Haehnchen]

fixed, thx for reporting