return valueList.size();
  }

  @Override
  public void forEach(BiConsumer<? super K, ? super V> action) {
    checkNotNull(action);
    ImmutableList<K> keyList = keySet.asList();
    for (int i = 0; i < size(); i++) {
      action.accept(keyList.get(i), valueList.get(i));
    }
  }

  @Override
  public @Nullable V get(@Nullable Object key) {
    int index = keySet.indexOf(key);