abcdefghijklmnopqrstuvwxyz
ABCDEFGHIJKLMNOPQRSTUVWXYZ
☹☹☹ Empty group !
☹☹ Duplicate group will be merged.
☹☹☹ Empty category !
☹☹ Duplicate environment will be merged.
☹☹ Duplicate category will be merged.
☹☹☹ Ignoring duplicate reference to in group .
⇒ Only its first reference ( package) will be kept.
☹ Ignoring duplicate reference to group in category .