@Nonnull String name, @Nonnull DistributedFunction<? super Processor.Context, ? extends S> createFn ) { return new SourceBuilder<S>(name, createFn).new Stream<Void>();
@Nonnull String name, @Nonnull DistributedFunction<? super Processor.Context, ? extends S> createFn ) { return new SourceBuilder<S>(name, createFn).new Batch<Void>();
@Nonnull DistributedFunction<? super Processor.Context, ? extends S> createFn ) { return new SourceBuilder<S>(name, createFn).new TimestampedStream<Void>();