Scala loan pattern

loaner.scala

  //Loaner pattern to ensure closing of bufferedsource
  
  ...
  def using[T](r: BufferedSource)(handler: BufferedSource => T): T = {
    try {
      handler(r)
    } finally {
      r.close()
    }
  }

  lazy val versioning:... = {
    Option(getClass.getResourceAsStream("/archives.json")) match {
      case Some(is) =>
        val resource = Source.fromInputStream(is)
        using(resource) { input =>
          ...
        }
      case _ => ...
    }
  }
  ...