make use of inherited function in inner class

  /** I want to make use of inherited function print() in inner class */
class PassImplToInnerClass extends OutputterImpl {
  class Inner extends Outputter {
    // ??? is there a less tedious way to avoid this ERROR:
    // class Inner needs to be abstract, since method print in trait Outputter of type ()Unit is not defined
    def print() = PassImplToInnerClass.this.print
  }
}

trait Outputter { def print() }

class OutputterImpl extends Outputter {
  def print() = println("bla")
}