src/main/java/io/reactivex/Maybe.java
@CheckReturnValue
    @SchedulerSupport(SchedulerSupport.COMPUTATION)
    public final Maybe<T> delay(long delay, TimeUnit unit) {
        return delay(delay, unit, Schedulers.computation());
    }
@CheckReturnValue
    @SchedulerSupport(SchedulerSupport.COMPUTATION)
    public final Maybe<T> delay(long delay, TimeUnit unit) {
        return delay(delay, unit, Schedulers.computation());
    }
@ CheckReturnValue @ SchedulerSupport ( SchedulerSupport . COMPUTATION ) public final Maybe < T > delay ( long delay , TimeUnit unit ) { return delay ( delay , unit , Schedulers . computation ( ) ) ; }
Returns a Maybe that signals the events emitted by the source Maybe shifted forward in time by a
specified delay.
<p>
<img width="640" height="310" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/delay.png" alt="">
<dl>
<dt><b>Scheduler:</b></dt>
<dd>This version of {@code delay} operates by default on the {@code computation} {@link Scheduler}.</dd>
</dl>

@param delay
the delay to shift the source by
@param unit
the {@link TimeUnit} in which {@code period} is defined
@return the new Maybe instance
@see <a href="http://reactivex.io/documentation/operators/delay.html">ReactiveX operators documentation: Delay</a>
Returns a Maybe that signals the events emitted by the source Maybe shifted forward in time by a specified delay . <p > <img width = 640 height = 310 src = https : // raw . github . com / wiki / ReactiveX / RxJava / images / rx - operators / delay . png alt = > <dl > <dt > <b > Scheduler : < / b > < / dt > <dd > This version of { @code delay } operates by default on the { @code computation } { @link Scheduler } . < / dd > < / dl >