The branch 5.0/group-selfservice-callback was deleted and repushed:
was 05c933e6cf05c281ae0f0bbf2fb023e9f24f32e9
now 17b17cbc603b24220b69677efef98a141b0adcc4
1: 05c933e6cf < -: ------- Add callback for modifying the group query
-: ------- > 1: 17b17cbc60 Add callback for modifying the group query