Re: Private nested class instance accessed via outer class public interface

[Murloc via Digitalmars-d-learn]

And since classes can be declared locally inside methods, you can 
also do something similar this way:

```d
import std.stdio;
import std.conv;
Object getB() {
    class B {
                private int field = 30;
        override string toString() => to!string(field);
        }
    return cast(Object)new B();
}

void main() {
    auto b = getB();
    writeln(b); // 30
}
```