I have read several tutorials and posts and I can’t really understand one thing regarding to groupping items (and groupping groups)
What I have seen for example:
Group gGroup1 Group gGroup2 (gGroup1) String foo (gGroup2, gGroup1)
Why you have to specify the two groups for an item? Doesn’t this Group definition means that Group2 is a part of Group1? Shouldn’t be enough just to group the item with the Group2?