public void testRemove_occurrences_absent() {
    int distinct = getMultiset().elementSet().size();
    assertEquals("multiset.remove(absent, 0) didn't return 0", 0, getMultiset().remove(e3(), 2));
    assertEquals(distinct, getMultiset().elementSet().size());
  }

  @CollectionFeature.Require(absent = SUPPORTS_REMOVE)
  public void testRemove_occurrences_unsupported_absent() {

  }

  @MapFeature.Require(value = SUPPORTS_REMOVE, absent = ALLOWS_NULL_VALUE_QUERIES)
  public void testRemoveNullValueForbidden() {
    try {
      multimap().remove(k0(), null);
      fail("Expected NullPointerException");
    } catch (NullPointerException expected) {
      // success
    }
    expectUnchanged();
  }

  @MapFeature.Require(value = SUPPORTS_REMOVE, absent = ALLOWS_NULL_KEY_QUERIES)

  }

  @MapFeature.Require(value = SUPPORTS_REMOVE, absent = ALLOWS_NULL_VALUE_QUERIES)
  public void testRemoveNullValueForbidden() {
    try {
      multimap().remove(k0(), null);
      fail("Expected NullPointerException");
    } catch (NullPointerException expected) {
      // success
    }
    expectUnchanged();
  }

  @MapFeature.Require(value = SUPPORTS_REMOVE, absent = ALLOWS_NULL_KEY_QUERIES)

        Optional<BinaryNode> root = Optional.absent();
        for (int i = 0; i < size; i++) {
          root = Optional.of(new BinaryNode(rng.nextInt(), root, Optional.<BinaryNode>absent()));
        }
        return root;
      }
    },
    ALL_RIGHT {
      @Override
      Optional<BinaryNode> createTree(int size, Random rng) {
        Optional<BinaryNode> root = Optional.absent();
        for (int i = 0; i < size; i++) {

  @CollectionSize.Require(absent = ZERO)
  public void testGetNullPresent() {
    initMultimapWithNullKey();
    assertContains(multimap().get(null), getValueForNullKey());
  }

  @MapFeature.Require(ALLOWS_NULL_KEY_QUERIES)
  public void testGetNullAbsent() {
    assertEmpty(multimap().get(null));
  }

  @MapFeature.Require(absent = ALLOWS_NULL_KEY_QUERIES)

@GwtCompatible
@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
public class ListRemoveAtIndexTester<E> extends AbstractListTester<E> {
  @ListFeature.Require(absent = SUPPORTS_REMOVE_WITH_INDEX)
  @CollectionSize.Require(absent = ZERO)
  public void testRemoveAtIndex_unsupported() {
    try {
      getList().remove(0);
      fail("remove(i) should throw");
    } catch (UnsupportedOperationException expected) {

  }

  @CollectionFeature.Require(absent = ALLOWS_NULL_QUERIES)
  public void testContains_nullNotContainedAndUnsupported() {
    expectNullMissingWhenNullUnsupported("contains(null) should return false or throw");
  }

  @CollectionFeature.Require(ALLOWS_NULL_VALUES)
  @CollectionSize.Require(absent = ZERO)
  public void testContains_nonNullWhenNullContained() {

  }

  @MapFeature.Require(absent = ALLOWS_NULL_KEY_QUERIES)
  public void testContainsEntryNullDisallowedBecauseKeyQueriesDisallowed() {
    try {
      multimap().containsEntry(null, v3());
      fail("Expected NullPointerException");
    } catch (NullPointerException expected) {
      // success
    }
  }

  @MapFeature.Require(absent = ALLOWS_NULL_VALUE_QUERIES)

  }

  @MapFeature.Require(absent = ALLOWS_NULL_KEY_QUERIES)
  public void testContains_nullNotContainedAndUnsupported() {
    expectNullKeyMissingWhenNullKeysUnsupported("containsKey(null) should return false or throw");
  }

  @MapFeature.Require(ALLOWS_NULL_KEYS)
  @CollectionSize.Require(absent = ZERO)
  public void testContains_nonNullWhenNullContained() {
    initMapWithNullKey();

@GwtCompatible
@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
public class ListRemoveAtIndexTester<E> extends AbstractListTester<E> {
  @ListFeature.Require(absent = SUPPORTS_REMOVE_WITH_INDEX)
  @CollectionSize.Require(absent = ZERO)
  public void testRemoveAtIndex_unsupported() {
    try {
      getList().remove(0);
      fail("remove(i) should throw");
    } catch (UnsupportedOperationException expected) {