return changed;
  }

  @CanIgnoreReturnValue
  @Override
  public Collection<V> replaceValues(@ParametricNullness K key, Iterable<? extends V> values) {
    checkNotNull(values);
    Collection<V> result = removeAll(key);
    putAll(key, values);
    return result;
  }

  @LazyInit @CheckForNull private transient Collection<Entry<K, V>> entries;

  @Override
  public Collection<Entry<K, V>> entries() {

    return changed;
  }

  @CanIgnoreReturnValue
  @Override
  public Collection<V> replaceValues(@ParametricNullness K key, Iterable<? extends V> values) {
    checkNotNull(values);
    Collection<V> result = removeAll(key);
    putAll(key, values);
    return result;
  }

  @LazyInit @CheckForNull private transient Collection<Entry<K, V>> entries;

  @Override
  public Collection<Entry<K, V>> entries() {