how do I define which node has to be root? I don't get it from the manual,
seems like it were mentioned in the beginning of chapter 5.2.11 but were
completely skipped at the examples.
It would be great if someone got an example of a hierarchical GPTree and
could explain how a GPType is bounded to a GPConstraint and so to a GPNode,
because this I also didn't understand from the manual.
Greetings from Germany