private @Nullable Object @Nullable [] hashTable;
    private int maxRunBeforeFallback;
    private int expandTableThreshold;
    private int hashCode;

    RegularSetBuilderImpl(int expectedCapacity) {
      super(expectedCapacity);
      this.hashTable = null;
      this.maxRunBeforeFallback = 0;
      this.expandTableThreshold = 0;
    }

    RegularSetBuilderImpl(RegularSetBuilderImpl<E> toCopy) {
      super(toCopy);