[MacRuby-devel] programatic binding (undefined bind method on NSTextField)

I want to bind my NSTextField to my model object. In objective-c I would do something like [mytextfield bind:@"value" toObject:myperson withKeyPath:@"address" options:nil]; But I have problems doing this in MacRuby with the following snippet: mytextfield = NSTextField.alloc.initWithFrame [20, 200, 200, 20] mytextfield.bind('value', toObject:'myperson', withKeyPath:'address') It says that NSTextField does not have a bind method. Do I misunderstand something, or is the bind method really missing and I have to set/remove the observers all myself? Thanks, ALex.