assertFalse(getMultiset().contains(e0()));
    assertEquals(expectedSize, getMultiset().size());
  }

  @CollectionSize.Require(SEVERAL)
  @CollectionFeature.Require(SUPPORTS_REMOVE)
  public void testElementSetRemoveDuplicatePropagatesToMultiset() {
    initThreeCopies();
    int size = getNumElements();
    int expectedSize = size - getMultiset().count(e0());
    Set<E> elementSet = getMultiset().elementSet();