} catch (UnsupportedOperationException tolerated) {
    }
    expectUnchanged();
  }

  @CollectionFeature.Require(absent = SUPPORTS_REMOVE)
  public void testRemoveAll_unsupportedNonePresent() {
    try {
      assertFalse(
          "removeAll(disjointCollection) should return false or throw "
              + "UnsupportedOperationException",