implements Serializable {

  transient ObjectCountHashMap<E> backingMap;
  transient long size;

  AbstractMapBasedMultiset(int distinctElements) {
    backingMap = newBackingMap(distinctElements);
  }

  abstract ObjectCountHashMap<E> newBackingMap(int distinctElements);

  @Override
  public final int count(@Nullable Object element) {
    return backingMap.get(element);
  }

    Iterables.addAll(multiset, elements);
    return multiset;
  }

  HashMultiset(int distinctElements) {
    super(distinctElements);
  }

  @Override
  ObjectCountHashMap<E> newBackingMap(int distinctElements) {
    return new ObjectCountHashMap<>(distinctElements);
  }

  @GwtIncompatible @J2ktIncompatible private static final long serialVersionUID = 0;