src/main/java/io/reactivex/Observable.java
@CheckReturnValue
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Observable<T> hide() {
        return RxJavaPlugins.onAssembly(new ObservableHide<T>(this));
    }
@CheckReturnValue
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Observable<T> hide() {
        return RxJavaPlugins.onAssembly(new ObservableHide<T>(this));
    }
@ CheckReturnValue @ SchedulerSupport ( SchedulerSupport . NONE ) public final Observable < T > hide ( ) { return RxJavaPlugins . onAssembly ( new ObservableHide < T > ( this ) ) ; }
Hides the identity of this Observable and its Disposable.
<p>Allows hiding extra features such as {@link io.reactivex.subjects.Subject}'s
{@link Observer} methods or preventing certain identity-based
optimizations (fusion).
<p>
<img width="640" height="283" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/hide.o.png" alt="">
<dl>
<dt><b>Scheduler:</b></dt>
<dd>{@code hide} does not operate by default on a particular {@link Scheduler}.</dd>
</dl>
@return the new Observable instance

@since 2.0
Hides the identity of this Observable and its Disposable . <p > Allows hiding extra features such as { @link io . reactivex . subjects . Subject } s { @link Observer } methods or preventing certain identity - based optimizations ( fusion ) . <p > <img width = 640 height = 283 src = https : // raw . github . com / wiki / ReactiveX / RxJava / images / rx - operators / hide . o . png alt = > <dl > <dt > <b > Scheduler : < / b > < / dt > <dd > { @code hide } does not operate by default on a particular { @link Scheduler } . < / dd > < / dl > @return the new Observable instance