//single file badimp.scala
// adding package object gives not found: type SortedMap
package object badimp {
}

package badimp {

  // move before package object works
  import scala.collection.immutable.SortedMap

  case class Nodal(value: String, children: SortedMap[String, Int])

  // adding target object restores sanity
  // but adding it before the import does not
  //object Nodal
}