DefaultMapBackedModel implements MapBackedModel { @Override public boolean isEmpty() { return values.isEmpty(); }  @Override void addValue(String name, Object result); @Override MapBackedModel<?> createChildMap(String name); @Override ListBackedModel<?> createChildList(String name); @Override Map<String, Object> getResult(); @Override boolean isEmpty();  }
@Test public void modelWithoutElementsIsEmpty() { assertTrue(new DefaultMapBackedModel().isEmpty()); }