Passing myself, a struct, as a C callback context

[Paul O'Neil via Digitalmars-d-learn]

I'm registering a callback with some C code.  The simplified story is
here, but the actual code is on GitHub [1] at the end if you care.

The call looks something like this.

void register(void(*fp)(void*), void* context);

I have a class that holds state for the callback and registers itself:

final class Klass
{
    void method()
    {
        register(callback_function, &this);
    }
}

As of dmd 2.067, doing "&this" is deprecated.  Is there an idiomatic way
to do this?

[0] Actual code is at
https://github.com/todayman/dubik/blob/master/source/vibe/core/drivers/rx.d#L177
.  The msg object eventually gets passed to the registration function.

Thanks,
-- 
Paul O'Neil
Github / IRC: todayman