src/main/java/io/reactivex/Single.java
@CheckReturnValue
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Single<T> hide() {
        return RxJavaPlugins.onAssembly(new SingleHide<T>(this));
    }
@CheckReturnValue
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Single<T> hide() {
        return RxJavaPlugins.onAssembly(new SingleHide<T>(this));
    }
Hides the identity of the current Single, including the Disposable that is sent
to the downstream via {@code onSubscribe()}.
<p>
<img width="640" height="458" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/Single.hide.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 Single instance
@since 2.0