assertFalse(Multisets.removeOccurrences(multiset, toRemove));
    assertTrue(multiset.isEmpty());
  }

  public void testRemoveOccurrencesMultisetEmpty() {
    Multiset<String> multiset = HashMultiset.create();
    Multiset<String> toRemove = HashMultiset.create(Arrays.asList("a", "b", "a"));
    assertFalse(Multisets.removeOccurrences(multiset, toRemove));
    assertTrue(multiset.isEmpty());
  }

    assertFalse(Multisets.removeOccurrences(multiset, toRemove));
    assertTrue(multiset.isEmpty());
  }

  public void testRemoveOccurrencesMultisetEmpty() {
    Multiset<String> multiset = HashMultiset.create();
    Multiset<String> toRemove = HashMultiset.create(Arrays.asList("a", "b", "a"));
    assertFalse(Multisets.removeOccurrences(multiset, toRemove));
    assertTrue(multiset.isEmpty());
  }

   *     Multiset})
   */
  @CanIgnoreReturnValue
  public static boolean removeOccurrences(
      Multiset<?> multisetToModify, Iterable<?> occurrencesToRemove) {
    if (occurrencesToRemove instanceof Multiset) {
      return removeOccurrences(multisetToModify, (Multiset<?>) occurrencesToRemove);
    } else {
      checkNotNull(multisetToModify);

   * cares whether or not an element appears at all. If you wish to remove one occurrence in this
   * multiset for every occurrence in {@code c}, see {@link Multisets#removeOccurrences(Multiset,
   * Multiset)}.
   *
   * <p>This method refines {@link Collection#removeAll} to further specify that it <b>may not</b>