Change scope of ClassTagWrapper in NewType to public?

[tim-2022]

When attempting to use Magnolia to generate macros which rely upon "ClassTag" (see below for a simplified example), Magnolia complains that the ClassTagWrapper helper isn't accessible:

object ClassTagWrapper in object Newtype cannot be accessed as a member of object zio.prelude.Newtype from object Part

I've tried using a local copy of ClassTagWrapper, but that doesn't seem to fix the problem, either, so I can't see another alternative than to give up on code reuse (I could manually define tags() on every Subtype we have, but there are many) or open up the scope of ClassTagWrapper. (Otherwise, let me know if you think I'm overlooking something!)

Example (also found at Scastie at https://scastie.scala-lang.org/OTm2XTJNTeafBu4I58HCtA).

import zio.prelude._
import scala.reflect.ClassTag
import scala.language.experimental.macros
import magnolia1.{CaseClass, Magnolia}

case class Part(name: PartId)

object Part {
  implicit val tags: Tags[Part] = Tags.forClass[Part]
}

type PartId = PartId.Type
object PartId extends Subtype[Int] with SubtypeTags[Int]

trait SubtypeTags[A] { this: Subtype[A] =>
  implicit def tags(implicit tag: ClassTag[Type], tags: Tags[A]): Tags[Type] =
    Tags(tag :: tags.tags)
}

case class Tags[A](tags: List[ClassTag[_]])

object Tags {
  type Typeclass[A] = Tags[A]
  def forClass[A]: Tags[A] = macro Magnolia.gen[A]
  def join[A](cc: CaseClass[Tags, A])(implicit t: ClassTag[A]): Tags[A] =
    Tags[A](t :: cc.parameters.flatMap(_.typeclass.tags).toList)
  implicit val forInt: Tags[Int] = Tags(List(implicitly[ClassTag[Int]]))
}

Thanks very much!
Tim