Using closure in function scope to make "real" private class members

[Nick Treleaven]

On Tuesday, 7 June 2022 at 10:40:41 UTC, Basile B. wrote:
> Also interfaces break visibility with joy. If an interface 
> implementer implements one of the func as private, you can 
> still use it, whatever is the call site.

Example? This gives an error:

```d
interface I {
	void f();
}
class C : I // error
{
	private void f(){}
}
```
privifaceimp.d(4): Error: class `privifaceimp.C` interface 
function `void f()` is not implemented