Request/How-to: Get return type of generic function

I have a function which accepts a generic function as its parameter. It does stuff with that function, then returns that function's return value(s) as its own. I would like for the returned properties to cascade from the generic function and propogate accordingly for type information.

In TypeScript, I would do:

const foo = <T extends Function>(func: T): ReturnType<T> => func(...)

未指定任何文件、测试或入口点。首先定位语言服务器中如何表示泛型函数及其返回类型，并使用 TypeScript ReturnType 示例作为所要求的行为；完成意味着传入的泛型函数返回的属性能够传播出来。