newEntryArray[outI++] = entry;
      }
      entryArray = newEntryArray;
    }
    return new JdkBackedImmutableMap<>(delegateMap, ImmutableList.asImmutableList(entryArray, n));
  }

  private final transient Map<K, V> delegateMap;
  private final transient ImmutableList<Entry<K, V>> entries;

  JdkBackedImmutableMap(Map<K, V> delegateMap, ImmutableList<Entry<K, V>> entries) {
    this.delegateMap = delegateMap;