/* extents */
Interval extent (Grob *refpoint, Axis) const;
void flush_extent_cache (Axis);
/* extents */
Interval extent (Grob *refpoint, Axis) const;
void flush_extent_cache (Axis);
Interval maybe_pure_extent (Grob *refpoint, Axis, bool pure, int start, int end);
/* refpoints */
Interval maybe_pure_extent (Grob *refpoint, Axis, bool pure, int start, int end);
/* refpoints */