verifySetContents(EnumSet.allOf(SomeEnum.class), allUnits);
  }

  @J2ktIncompatible
  @GwtIncompatible // complementOf
  public void testComplementOfFullSet() {
    Set<SomeEnum> allUnits = newHashSet(SomeEnum.values());
    EnumSet<SomeEnum> noUnits = Sets.complementOf(allUnits, SomeEnum.class);
    verifySetContents(noUnits, EnumSet.noneOf(SomeEnum.class));
  }