extern WStacking *group_find_stacking(WGroup *ws, WRegion *r);
extern WStacking *group_find_to_focus(WGroup *ws, WStacking *to_try);
extern WStacking *group_find_stacking(WGroup *ws, WRegion *r);
extern WStacking *group_find_to_focus(WGroup *ws, WStacking *to_try);