scala> List(1,2,3)
val res0: List[Int] = List(1, 2, 3)
scala> Map("foo" -> 1)
val res1: Map[String, Int] = Map("foo" -> 1)
scala> Seq('a','b')
val res2: Seq[Char] = List('a', 'b')
scala> Set(4, 5)
val res3: Set[Int] = Set(4, 5)
scala> Iterator(1)
val res4: Iterator[Int] = non-empty iterator
