@CheckForNull final ReferenceEntry<K, V> next;
    volatile ValueReference<K, V> valueReference = unset();

    @Override
    public ValueReference<K, V> getValueReference() {
      return valueReference;
    }

    @Override
    public void setValueReference(ValueReference<K, V> valueReference) {
      this.valueReference = valueReference;
    }

    @Override
    public int getHash() {

      this.key = null;
    }

    private ValueReference<K, V> valueReference = unset();

    @Override
    public ValueReference<K, V> getValueReference() {
      return valueReference;
    }

    @Override
    public void setValueReference(ValueReference<K, V> valueReference) {
      this.valueReference = valueReference;
    }

    @Override

      this.key = null;
    }

    private ValueReference<K, V> valueReference = unset();

    @Override
    public ValueReference<K, V> getValueReference() {
      return valueReference;
    }

    @Override
    public void setValueReference(ValueReference<K, V> valueReference) {
      this.valueReference = valueReference;
    }

    @Override