Method just

src/main/java/io/reactivex/rxjava3/core/Maybe.java:1315–1321

Returns a Maybe that emits a specified item. To convert any object into a Maybe that emits that object, pass that object into the just method. <

(T item)

     * @see <a href="http://reactivex.io/documentation/operators/just.html">ReactiveX operators documentation: Just</a>
     */
    @CheckReturnValue
    @NonNull
    @SchedulerSupport(SchedulerSupport.NONE)
    public static <@NonNull T> Maybe<T> just(T item) {
        Objects.requireNonNull(item, "item is null");
        return RxJavaPlugins.onAssembly(new MaybeJust<>(item));
    }

    /**
     * Merges an {@link Iterable} sequence of {@link MaybeSource} instances into a single {@link Flowable} sequence,