Method concat4

src/test/java/io/reactivex/rxjava3/maybe/MaybeTest.java:1320–1325

()

    }

    @Test
    public void concat4() {
        Maybe.concat(Maybe.just(1), Maybe.just(2), Maybe.just(3), Maybe.just(4))
        .test()
        .assertResult(1, 2, 3, 4);
    }

    @Test
    public void concatIterable() {