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singleton

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singleton

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class Singleton{
public:
  static Singleton& getInstance(){
    static Singleton instance;
    return instance;
  }
private:
  Singleton() = default;
  ~Singleton() = default;
  Singleton(const Singleton&) = delete;
  Singleton(Singleton&&) = delete;
  void operator=(const Singleton&) = delete;
  void operator=(Singleton&&) = delete;
}