---
module a1;
class A {
        protected void foo();
}
---

and

---
import a1;

void main() {
        auto a = new A;
        a.foo();
}
---

a2.d(5): Error: no property foo for type a1.A, did you mean a1.A.foo?


It works if public of course, but if protected or private it gives a silly error.

on private, it should probably not suggest anything; private members are supposed to be invisible. But the protected case should probably explicitly call out that it is protected and thus inaccessible.