public void Construct()
        {
            using (ITimeline timeline = new DefaultTimeline())
            {
                IGroup group = timeline.AddAudioGroup();

                var args = new AddedGroupEventArgs(group, timeline);
                Assert.AreSame(group, args.Item);
                Assert.AreSame(timeline, args.Container);
            }
        }
        public void Construct()
        {
            using (ITimeline timeline = new DefaultTimeline())
            {
                IGroup group = timeline.AddAudioGroup();

                var args = new AddedGroupEventArgs(group, timeline);
                Assert.AreSame(group, args.Item);
                Assert.AreSame(timeline, args.Container);
            }
        }