ขี้เกียจ Singleton ตัวอย่างเช่น

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ขี้เกียจ Singleton ตัวอย่างเช่น

class MyLazyService {
  /// Factory method that reuse same instance automatically
  factory MyLazyService() => Singleton.lazy(() => MyLazyService._()).instance;

  /// Private constructor
  MyLazyService._() {}

  /// do something
  void doSomething() {}
}

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