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class Singleton {
public:
    static Singleton& Instance() {
        static Singleton theSingleton;
        return theSingleton;
    }

    /* more (non-static) functions here */

private:
    Singleton();                            // ctor hidden
    Singleton(Singleton const&);            // copy ctor hidden
    Singleton& operator=(Singleton const&); // assign op. hidden
    ~Singleton();                           // dtor hidden
};