Want to mix ATrait below to get functionalities on MyClass. But there is AType defined in ATrait that I want to have access to - at declaration time. Is this possible?

MixedinTrait.scala

// Stuff below doesn't compile 
trait ATrait {
  val something: Int
  // <some stuff here>
  case class AType[T](value: T)
}
case class MyClass(something: Int, f: AType => Int) extends ATrait // error: not found: type AType

// this version needs _something_ to be defined: 
object Wrapper extends ATrait {  // error: something undefined
  case class MyClass(f: AType => Int) extends ATrait
}

// is this the only way to do it?
case class AType[T](value: T)
trait ATrait {
  // <some stuff here>
}
case class MyClass(f: AType => Int) extends ATrait