# | Line 69 | Line 69 | namespace oopse{ | |
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69 | delete previousSnapshot_; | |
70 | } | |
71 | ||
72 | < | virtual bool advance() {} |
72 | > | virtual bool advance() { return true; } |
73 | ||
74 | virtual Snapshot* getSnapshot(int id) = 0; | |
75 |
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