- bool h_shift_b_;
-
- Array<Notehead*> head_l_arr_;
- Interval_t<int> head_positions_interval()const;
-
- /** The relative position of the "voice" containing this
- chord. Normally this would be the same as the stem direction,
- but rests do not have stems. */
- int dir_i_;
-
-
- NAME_MEMBERS(Note_column);
- Note_column();
- void add(Notehead *);
- void add(Stem *);
- void sort();
- void add(Script* s) { Script_column::add(s);}
+ static bool shift_less (Grob *const &, Grob *const &);
+ static Direction dir (Grob *me);
+ static Grob *accidentals (Grob *me);
+ static Grob *arpeggio (Grob *me);
+ static Slice head_positions_interval (Grob *me);
+ static void translate_rests (Grob *me, int dy);
+ static Grob *first_head (Grob *me);
+ static Grob *get_rest (Grob *me);
+ static void set_stem (Grob *me, Grob *);
+ static void add_head (Grob *me, Grob *);
+ static bool has_rests (Grob *me);
+ static Grob *dot_column (Grob *me);
+ static Interval cross_staff_extent (Grob *me, Grob *refp);
+ DECLARE_GROB_INTERFACE();
+
+ static Item *get_stem (Grob *);