}

    private static final SID USER_SID = new SID() {

        @Override
        public SID getDomainSid() {
            return null;
        }

        @Override
        public int getRid() {
            return 0;
        }

        @Override
        public String toDisplayString() {
            return getDomainName() + "\\" + getAccountName();
        }

        @Override

    Object[] unused2 = set.toArray(new Object[2]);
  }

  interface Interface extends Comparable<Interface> {}

  static class Impl implements Interface {
    static int nextId;
    Integer id = nextId++;

    @Override
    public int compareTo(Interface other) {
      return id.compareTo(((Impl) other).id);
    }
  }

  public void testOf_ordering_dupes() {

    Object[] unused2 = set.toArray(new Object[2]);
  }

  interface Interface extends Comparable<Interface> {}

  static class Impl implements Interface {
    static int nextId;
    Integer id = nextId++;

    @Override
    public int compareTo(Interface other) {
      return id.compareTo(((Impl) other).id);
    }
  }

  public void testOf_ordering_dupes() {