- Item();
- Real hpos_f() const;
-
- virtual Line_of_score * line_l() const;
- virtual Paper_column * column_l () const;
-
- static int left_right_compare (Item const *, Item const*);
-
- Item (Item const &);
+ Item *find_prebroken_piece (Direction) const;
+ Grob *find_broken_piece (System *) const;
+ virtual System *get_system () const;
+ virtual Paper_column *get_column () const;
+ virtual void handle_prebroken_dependencies ();
+ static bool has_interface (Grob *);