}

  ImmutableMapEntry(ImmutableMapEntry<K, V> contents) {
    super(contents.getKey(), contents.getValue());
    // null check would be redundant
  }

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

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

  /**