ForkJoin.scala

import scala.collection.immutable.List;

abstract class ForkJoin {

  protected def getList[T]: List[T]

  def apply[A, B]: (List[A], List[B]) = {
    (getList[A], getList[B])
  }
}

object ForkJoin {

  def main(args: Array[String]) = {

    val forkJoin = new ForkJoin {
      override protected def getList[T]: scala.List[T] =
        List.empty[T]
    }

    val (intList, stringList) = forkJoin[Int, String]
    println(3 :: intList)
    println("Hello" :: stringList)
  }
}