@Test public void onlyOneInstance() { assertSame(Unit.unit(), Unit.unit()); }
private Unit() {}
Unit implements Serializable { private Unit() {} }
Unit implements Serializable { private Unit() {} private  Unit(); }
Unit implements Serializable { private Unit() {} private  Unit(); static Unit unit(); @Override String toString(); }
Unit implements Serializable { private Unit() {} private  Unit(); static Unit unit(); @Override String toString();  }