}

    /**
     * Returns a Set view of the keys contained in this map.
     *
     * @return a set view of the keys contained in this map
     */
    @Override
    public Set<String> keySet() {
        return parent.keySet();
    }

    /**
     * Returns a Collection view of the values contained in this map.
     *
     * @return a collection view of the values contained in this map
     */
    @Override

#
# Example:
# map:{
#     # This means that String includes GreaterThan at MEMBER.MEMBER_ACCOUNT only
#     # and LessThan at PRODUCT.PRODUCT_NAME and PRODUCT.PRODUCT_HANDLE_CODE,
#     # and InScope for LONGVARCHAR(e.g. text type) is excluded.
#     ; String = map:{
#         ; GreaterThan = map:{ MEMBER = list:{ MEMBER_ACCOUNT } }
#         ; LessThan = map:{ PRODUCT = list:{ PRODUCT_NAME ; PRODUCT_HANDLE_CODE } }

    } catch (RuntimeException tolerated) {
      // GWT's TreeMap.keySet().removeAll(null) doesn't throws NPE.
    }
  }

  @Override
  public void testKeySetRetainAllNullFromEmpty() {
    try {
      super.testKeySetRetainAllNullFromEmpty();
    } catch (RuntimeException tolerated) {
      // GWT's TreeMap.keySet().retainAll(null) doesn't throws NPE.
    }
  }

  @Override

      biMap.clear();
    }
  }

  @LazyInit private transient Set<K> keySet;

  @Override
  public Set<K> keySet() {
    Set<K> result = keySet;
    return (result == null) ? keySet = new KeySet() : result;
  }

  private final class KeySet extends View<K, V, K> {
    KeySet() {
      super(HashBiMap.this);
    }

    @Override
    @ParametricNullness

  @CollectionSize.Require(SEVERAL)
  public void testClearConcurrentWithKeySetIteration() {
    assertThrows(
        ConcurrentModificationException.class,
        () -> {
          Iterator<K> iterator = getMap().keySet().iterator();
          getMap().clear();
          iterator.next();
        });
  }

  @MapFeature.Require({FAILS_FAST_ON_CONCURRENT_MODIFICATION, SUPPORTS_REMOVE})
  @CollectionSize.Require(SEVERAL)

    this(new TreeMap<K, V>(map));
  }

  private SafeTreeMap(NavigableMap<K, V> delegate) {
    this.delegate = delegate;
    if (delegate == null) {
      throw new NullPointerException();
    }
    for (K k : keySet()) {
      checkValid(k);
    }
  }

  @Override
  public @Nullable Entry<K, V> ceilingEntry(K key) {
    return delegate.ceilingEntry(checkValid(key));
  }

  @Override

    multimapView.remove("bar", 2);
    assertFalse(multimapView.containsKey("bar"));
    assertFalse(map.containsKey("bar"));
    assertEquals(map.keySet(), multimapView.keySet());
    assertEquals(map.keySet(), multimapView.keys().elementSet());
    assertThat(multimapView.keys()).contains("foo");
    assertThat(multimapView.values()).contains(1);

                    // Try to parse as User-agent directive
                    String value = getValue(USER_AGENT_RECORD, line);
                    if (value != null) {
                        // If we've seen group-member records (Disallow, Allow, etc.),
                        // this starts a new group, so clear the current directive list
                        if (isGroupRecordStarted) {
                            currentDirectiveList.clear();

   * collection in setUp(), but that caused problems when a tester changed the
   * value of set or collection but not both.
   */
  protected final Set<E> getSet() {
    return (Set<E>) collection;
  }

        if (acceptedApiChanges != null) {
            this.acceptedApiChanges = AcceptedApiChanges.fromAcceptedChangesMap(acceptedApiChanges.get()).keySet();
        } else {
            this.acceptedApiChanges = Collections.emptySet();
        }
    }

    @Override
    @SuppressWarnings("unchecked")
    public void execute(ViolationCheckContext context) {