class Test : Object {
  private dynamic Gst.Element  adder;
  private dynamic Gst.Element  queue;
  private dynamic Gst.Pipeline pipeline;

  public void test() {
    pipeline = new Gst.Pipeline("pipeline");
    adder = Gst.ElementFactory.make("adder", "adder");
    adder = Gst.ElementFactory.make("queue2", "queue2");

    pipeline.add_many(adder, queue);
  }
}
