reflection-scala-annotations.scala:5: warning: Implementation restriction: subclassing Classfile does not
make your annotation visible at runtime.  If that is what
you want, you must write the annotation class in Java.
class jann(x: Int, y: Array[Int]) extends ClassfileAnnotation
      ^
new sann(1, scala.collection.immutable.List.apply[Int](1, 2))
new jann(y = Array(1, 2), x = 2)