This sounds more like a feature request than a bug report. As I see it, the solution is to add another policy class to SingletonHolder, rather than changing the DeletableSingleton policy.
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This sounds more like a feature request than a bug report. As I see it, the solution is to add another policy class to SingletonHolder, rather than changing the DeletableSingleton policy.
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Yes, I also think this is a feature request.