Calling getType() multiple times may give you the parents, I did that here:
[https://github.com/StefanSalewski/gintro/blob/master/gintro/gimpl.nim#L12](https://github.com/StefanSalewski/gintro/blob/master/gintro/gimpl.nim#L12) I got it from a hint of Araq, I have no idea what really is happening.
