}

    @GwtIncompatible
    @J2ktIncompatible
        @SuppressWarnings("unchecked") // reading data stored by writeObject
    private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException {
      stream.defaultReadObject();
      factory = (Supplier<? extends Collection<V>>) requireNonNull(stream.readObject());
      Map<K, Collection<V>> map = (Map<K, Collection<V>>) requireNonNull(stream.readObject());

    default Class<? extends LaJob> getSchedulerJobClassAsClass() {
        try {
            return (Class<? extends LaJob>) Class.forName(getSchedulerJobClass());
        } catch (final ClassNotFoundException e) {
            throw new ClassNotFoundRuntimeException(e);
        }
    }

    String getSchedulerConcurrentExecMode();

    default JobConcurrentExec getSchedulerConcurrentExecModeAsEnum() {

          .concurrencyLevel(concurrencyLevel);
    }

    @SuppressWarnings("unchecked")
    @J2ktIncompatible // java.io.ObjectInputStream
    void readEntries(ObjectInputStream in) throws IOException, ClassNotFoundException {
      while (true) {
        K key = (K) in.readObject();
        if (key == null) {
          break; // terminator
        }
        V value = (V) in.readObject();