}

  @Override
  void init(int expectedSize) {
    super.init(expectedSize);
    this.firstEntry = ENDPOINT;
    this.lastEntry = ENDPOINT;
  }

  @Override
  int allocArrays() {
    int expectedSize = super.allocArrays();
    this.predecessor = new int[expectedSize];
    this.successor = new int[expectedSize];
    return expectedSize;
  }

  @Override
  @CanIgnoreReturnValue