D/Objective-C 64bit

[Christian Schneider via Digitalmars-d-announce]

what is funky in this context (see above): even when using
ObjcObject in both the mapping and the action method, the test

if (sender is demoTableView) {
     //
}

does not fail in the action, only a cast to a NSTableView object
fails. Of course, in this setting it's not really a problem, I
can work directly on the demoTableView member and can forget
about the sender, but this is against how I would do it in
Objective-C where I can always cast an id reference to the
expected type.