code: public static <IN, OUT> FluxProcessor<IN, OUT> wrap(final Subscriber<IN> upstream, final Publisher<OUT> downstream) {
  		return new DelegateProcessor<>(downstream, upstream);
  	}
docs: Transform a receiving {@link Subscriber} and a producing {@link Publisher} in a logical {@link FluxProcessor}.
  The link between the passed upstream and returned downstream will not be created automatically, e.g. not
  subscribed together. A {@link Processor} might choose to have orthogonal sequence input and output.
  
  @param <IN> the receiving type
  @param <OUT> the producing type
  
  @param upstream the upstream subscriber
  @param downstream the downstream publisher
  @return a new blackboxed {@link FluxProcessor}