src/main/java/io/reactivex/Maybe.java
@CheckReturnValue
    @NonNull
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Maybe<T> onErrorResumeNext(final MaybeSource<? extends T> next) {
        ObjectHelper.requireNonNull(next, "next is null");
        return onErrorResumeNext(Functions.justFunction(next));
    }
@CheckReturnValue
    @NonNull
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Maybe<T> onErrorResumeNext(final MaybeSource<? extends T> next) {
        ObjectHelper.requireNonNull(next, "next is null");
        return onErrorResumeNext(Functions.justFunction(next));
    }
Instructs a Maybe to pass control to another {@link MaybeSource} rather than invoking
{@link MaybeObserver#onError onError} if it encounters an error.
<p>
<img width="640" height="310" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/onErrorResumeNext.png" alt="">
<p>
You can use this to prevent errors from propagating or to supply fallback data should errors be
encountered.
<dl>
<dt><b>Scheduler:</b></dt>
<dd>{@code onErrorResumeNext} does not operate by default on a particular {@link Scheduler}.</dd>
</dl>

@param next
the next {@code MaybeSource} that will take over if the source Maybe encounters
an error
@return the new Maybe instance
@see <a href="http://reactivex.io/documentation/operators/catch.html">ReactiveX operators documentation: Catch</a>