src/main/java/io/reactivex/Maybe.java
@SuppressWarnings({ "unchecked", "rawtypes" })
    @BackpressureSupport(BackpressureKind.FULL)
    @CheckReturnValue
    @SchedulerSupport(SchedulerSupport.NONE)
    public static <T> Flowable<T> mergeArrayDelayError(MaybeSource<? extends T>... sources) {
        if (sources.length == 0) {
            return Flowable.empty();
        }
        return Flowable.fromArray(sources).flatMap((Function)MaybeToPublisher.instance(), true, sources.length);
    }
@SuppressWarnings({ "unchecked", "rawtypes" })
    @BackpressureSupport(BackpressureKind.FULL)
    @CheckReturnValue
    @SchedulerSupport(SchedulerSupport.NONE)
    public static <T> Flowable<T> mergeArrayDelayError(MaybeSource<? extends T>... sources) {
        if (sources.length == 0) {
            return Flowable.empty();
        }
        return Flowable.fromArray(sources).flatMap((Function)MaybeToPublisher.instance(), true, sources.length);
    }
Flattens an array of MaybeSources into one Flowable, in a way that allows a Subscriber to receive all
successfully emitted items from each of the source MaybeSources without being interrupted by an error
notification from one of them.
<p>
This behaves like {@link #merge(Publisher)} except that if any of the merged MaybeSources notify of an
error via {@link Subscriber#onError onError}, {@code mergeDelayError} will refrain from propagating that
error notification until all of the merged MaybeSources have finished emitting items.
<p>
<img width="640" height="380" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/mergeDelayError.png" alt="">
<p>
Even if multiple merged MaybeSources send {@code onError} notifications, {@code mergeDelayError} will only
invoke the {@code onError} method of its Subscribers once.
<dl>
<dt><b>Backpressure:</b></dt>
<dd>The operator honors backpressure from downstream.</dd>
<dt><b>Scheduler:</b></dt>
<dd>{@code mergeArrayDelayError} does not operate by default on a particular {@link Scheduler}.</dd>
</dl>

@param <T> the common element base type
@param sources
the Iterable of MaybeSources
@return a Flowable that emits items that are the result of flattening the items emitted by the
MaybeSources in the Iterable
@see <a href="http://reactivex.io/documentation/operators/merge.html">ReactiveX operators documentation: Merge</a>