- static vector<Box> boxes (Grob *me);
- static Interval conditional_width (Grob *, Grob *);
- static Interval width (Grob *);
- static Interval relative_width (Grob *, Grob *);
+ static vector<Box> boxes (Grob *me, Grob *left);
+ static Skyline conditional_skyline (Grob *, Grob *);