trait RecordBase[T] extends Dynamic {
  def typed[A]: A = error("doh");
  var data: Option[Map[String, AnyRef]] = None

  def withData(map: Map[String, AnyRef]) = {
    this.data = Some(map)
    this.asInstanceOf[T]
  }

  def applyDynamic(name: String)(args: Any*) = {
    data.map(_(name)).getOrElse(error("Unknown field " + name))
  }

  override def toString = getClass.getName + "[" + data.toString + "]"
}