// null check would be redundant
  }

  @CheckForNull
  ImmutableMapEntry<K, V> getNextInKeyBucket() {
    return null;
  }

  @CheckForNull
  ImmutableMapEntry<K, V> getNextInValueBucket() {
    return null;
  }

  /**
   * Returns true if this entry has no bucket links and can safely be reused as a terminal entry in
   * a bucket in another map.
   */
  boolean isReusable() {

      throws BucketOverflowException {
    int bucketSize = 0;
    for (; valueBucketHead != null; valueBucketHead = valueBucketHead.getNextInValueBucket()) {
      checkNoConflict(!value.equals(valueBucketHead.getValue()), "value", entry, valueBucketHead);
      if (++bucketSize > MAX_HASH_BUCKET_LENGTH) {
        throw new BucketOverflowException();
      }
    }