def downloadFoo(): Future[String] = {
            Future {
                "FooResult"
            }
        }
        def downloadBar(): Future[Int] = {
            Future {
                2
            }
        }
        def downloadBaz(): Future[Double] = {
            Future {
                3.0
            }
        }
        val res = for {
            foo <- downloadFoo()
            bar <- downloadBar()
            baz <- downloadBaz()
        } yield (foo, bar, baz)

        res.onSuccess { case (foo, bar, baz) =>
            println(foo)
            println(bar)
            println(baz)
        }