make Item::add() virtual
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@ -217,7 +217,6 @@ public:
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virtual void add (Item *);
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virtual void add (Item *);
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virtual void add_front (Item *);
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virtual void add_front (Item *);
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virtual void remove (Item *);
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virtual void remove (Item *);
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/* XXX this should become virtual also */
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void clear (bool with_delete = false);
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void clear (bool with_delete = false);
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std::list<Item*> const & items () const {
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std::list<Item*> const & items () const {
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