src/main/java/io/reactivex/Observable.java
@CheckReturnValue
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Maybe<T> lastElement() {
        return RxJavaPlugins.onAssembly(new ObservableLastMaybe<T>(this));
    }
@CheckReturnValue
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Maybe<T> lastElement() {
        return RxJavaPlugins.onAssembly(new ObservableLastMaybe<T>(this));
    }
@ CheckReturnValue @ SchedulerSupport ( SchedulerSupport . NONE ) public final Maybe < T > lastElement ( ) { return RxJavaPlugins . onAssembly ( new ObservableLastMaybe < T > ( this ) ) ; }
Returns a Maybe that emits the last item emitted by this Observable or
completes if this Observable is empty.
<p>
<img width="640" height="305" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/lastElement.png" alt="">
<dl>
<dt><b>Scheduler:</b></dt>
<dd>{@code lastElement} does not operate by default on a particular {@link Scheduler}.</dd>
</dl>

@return a Maybe that emits the last item from the source ObservableSource or notifies observers of an
error
@see <a href="http://reactivex.io/documentation/operators/last.html">ReactiveX operators documentation: Last</a>
Returns a Maybe that emits the last item emitted by this Observable or completes if this Observable is empty . <p > <img width = 640 height = 305 src = https : // raw . github . com / wiki / ReactiveX / RxJava / images / rx - operators / lastElement . png alt = > <dl > <dt > <b > Scheduler : < / b > < / dt > <dd > { @code lastElement } does not operate by default on a particular { @link Scheduler } . < / dd > < / dl >