reactor-core/src/main/java/reactor/core/publisher/Flux.java
@SafeVarargs
	public static <I, O> Flux<O> zip(
			final Function<? super Object[], ? extends O> combinator, Publisher<? extends I>... sources) {
		return zip(combinator, Queues.XS_BUFFER_SIZE, sources);
	}
@SafeVarargs
	public static <I, O> Flux<O> zip(
			final Function<? super Object[], ? extends O> combinator, Publisher<? extends I>... sources) {
		return zip(combinator, Queues.XS_BUFFER_SIZE, sources);
	}
Zip multiple sources together, that is to say wait for all the sources to emit one
element and combine these elements once into an output value (constructed by the provided
combinator).
The operator will continue doing so until any of the sources completes.
Errors will immediately be forwarded.
This "Step-Merge" processing is especially useful in Scatter-Gather scenarios.
<p>
<img class="marble" src="doc-files/marbles/zipIterableSourcesForFlux.svg" alt="">

@param combinator The aggregate function that will receive a unique value from each upstream and return the
value to signal downstream
@param sources the array providing sources to zip
@param <I> the type of the input sources
@param <O> the combined produced type

@return a zipped {@link Flux}