public Sliced_path_item(Sliced_path_item_type type, int i) : base(i) { Item_type = type; }
public Sliced_path_item(Sliced_path_item_type type, Polyline p) : base(p) { Item_type = type; }
public Sliced_path_item(Sliced_path_item_type type) : base() { Item_type = type; }