/** Strategy for handling entries and segments in a type-safe and efficient manner. */
  final transient InternalEntryHelper<K, V, E, S> entryHelper;

  /**
   * Creates a new, empty map with the specified strategy, initial capacity and concurrency level.
   */
  private MapMakerInternalMap(MapMaker builder, InternalEntryHelper<K, V, E, S> entryHelper) {
    concurrencyLevel = min(builder.getConcurrencyLevel(), MAX_SEGMENTS);