static Real calc_offset (Spanner *me, Axis a); // not used
- static Grob *select_reference_stem (Grob *me, std::vector<Grob *> const &cols);
+ static Grob *select_reference_stem (Grob *me, vector<Grob *> const &cols);
static Drul_array<Grob *> adjacent_note_columns (Grob *me, Grob *ref_stem);
static bool knee_position_against_beam (Grob *me, Grob *ref_stem);
};