for my graph i want to have a bunch of different nesting groups. i had to do them all manually in yed - i'd like to be able to have that in XLS and then import. perhaps something like.. group level 1 -> group 2 -> group 3 -> as far up..
NODE1 - group a -> group C
NODE2 - group a -> group C
NODE 3- group b -> group C
NODE4 - group C only..