Type expectedType = new TypeToken<Map<String, List<Object>>>() {}.getType();
    assertEquals(
        expectedType,
        new TypeToken<ListMap<String, Object>>() {}.getSupertype(Map.class).getType());
  }

  private interface StringListMap<V> extends ListMap<String, V> {}

  public <V> void testGetSupertype_partiallySpecializedType() {