@Test
  @SuppressWarnings("unchecked")
  public void rawMapInterfacesShouldBeEmpty() {
    final MapBean mapBean = enhancedRandom.nextObject(MapBean.class);

    assertThat(mapBean).isNotNull();

    assertThat(mapBean.getMap()).isEmpty();
    assertThat(mapBean.getSortedMap()).isEmpty();
    assertThat(mapBean.getNavigableMap()).isEmpty();
    assertThat(mapBean.getConcurrentMap()).isEmpty();
    assertThat(mapBean.getConcurrentNavigableMap()).isEmpty();
  }