There are some Interfaces in gtk witch a currently not implemented as interfaces in gtkD.
currently the following are not or not completely implemented:
Before the RecentChooser? and Buildable interfaces were added there were two interfaces implemented in two different ways. GtkCellLayout? which uses a Template/Interface combo, and FileChooser? which uses a property. One possibility of why FileChooser? was implement as a property is probably that the wrapper didn't handle Interfaces with signals. and the same for the not implemented interfaces. But this shouldn't be a problem since r386
I think all the interfaces should be added with a Template/Interface combo despite the problems with the Buildable interface and getName/setName. the not implemented interfaces are not implemented by a lot of classes like buildable so that problem probably doesn't exist.