Scala3-WildCardsQuestionMark.scala

// Input a sequence of any element type and constructs a string:
def tos(seq: Seq[?]): String = seq.mkString("[", ", ", "]") 
tos(Vector(1,2,3))     // "[1, 2, 3]"

// A reminder of given imports, but specifically how to import all
// givens of a parameterized type:
trait Marker[T]
object Obj:
  given Marker[Int] with {}  
  given Marker[List[?]] with {}

import Obj.{given Marker[Int]}   // Import just the Marker[Int]
import Obj.{given Marker[?]}     // Import all given Markers