previous.setNextInWriteQueue(next);
    next.setPreviousInWriteQueue(previous);
  }

  // Guarded By Segment.this
  static <K, V> void nullifyWriteOrder(ReferenceEntry<K, V> nulled) {
    ReferenceEntry<K, V> nullEntry = nullEntry();
    nulled.setNextInWriteQueue(nullEntry);
    nulled.setPreviousInWriteQueue(nullEntry);
  }

  /**

    private ReferenceEntry<K, V> nextWrite = nullEntry();

    @Override
    public ReferenceEntry<K, V> getNextInWriteQueue() {
      return nextWrite;
    }

    @Override
    public void setNextInWriteQueue(ReferenceEntry<K, V> next) {
      this.nextWrite = next;
    }

    private ReferenceEntry<K, V> previousWrite = nullEntry();

    @Override

    private ReferenceEntry<K, V> nextWrite = nullEntry();

    @Override
    public ReferenceEntry<K, V> getNextInWriteQueue() {
      return nextWrite;
    }

    @Override
    public void setNextInWriteQueue(ReferenceEntry<K, V> next) {
      this.nextWrite = next;
    }

    private ReferenceEntry<K, V> previousWrite = nullEntry();

    @Override