}
  }

  static class FactoryMethodDoesNotAcceptNull {

    final String name;

    private FactoryMethodDoesNotAcceptNull(String name) {
      this.name = checkNotNull(name);
    }

    public static FactoryMethodDoesNotAcceptNull create(String name) {
      return new FactoryMethodDoesNotAcceptNull(name);
    }
  }

  static class ConstructorAcceptsNull {