src/main/java/io/reactivex/Flowable.java
@CheckReturnValue
    @BackpressureSupport(BackpressureKind.UNBOUNDED_IN)
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Iterable<T> blockingNext() {
        return new BlockingFlowableNext<T>(this);
    }
@CheckReturnValue
    @BackpressureSupport(BackpressureKind.UNBOUNDED_IN)
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Iterable<T> blockingNext() {
        return new BlockingFlowableNext<T>(this);
    }
@ CheckReturnValue @ BackpressureSupport ( BackpressureKind . UNBOUNDED_IN ) @ SchedulerSupport ( SchedulerSupport . NONE ) public final Iterable < T > blockingNext ( ) { return new BlockingFlowableNext < T > ( this ) ; }
Returns an {@link Iterable} that blocks until this {@code Flowable} emits another item, then
returns that item.
<p>
<img width="640" height="490" src="https://github.com/ReactiveX/RxJava/wiki/images/rx-operators/B.next.png" alt="">
<dl>
<dt><b>Backpressure:</b></dt>
<dd>The operator consumes the source {@code Flowable} in an unbounded manner
(i.e., no backpressure applied to it).</dd>
<dt><b>Scheduler:</b></dt>
<dd>{@code blockingNext} does not operate by default on a particular {@link Scheduler}.</dd>
</dl>

@return an {@link Iterable} that blocks upon each iteration until this {@code Flowable} emits
a new item, whereupon the Iterable returns that item
@see <a href="http://reactivex.io/documentation/operators/takelast.html">ReactiveX documentation: TakeLast</a>
Returns an { @link Iterable } that blocks until this { @code Flowable } emits another item then returns that item . <p > <img width = 640 height = 490 src = https : // github . com / ReactiveX / RxJava / wiki / images / rx - operators / B . next . png alt = > <dl > <dt > <b > Backpressure : < / b > < / dt > <dd > The operator consumes the source { @code Flowable } in an unbounded manner ( i . e . no backpressure applied to it ) . < / dd > <dt > <b > Scheduler : < / b > < / dt > <dd > { @code blockingNext } does not operate by default on a particular { @link Scheduler } . < / dd > < / dl >