public override IDisposable Subscribe(IObserver <Any> observer)
{
var data = new SamplePageData();
var pageStackNode = new StateReaderNode(this.StoreHolder, PageConst.StateStackKey);
return(pageStackNode
.Select(it => it.Value <PageStack>().Peek().GetData <SamplePageData>())
.Select(it => it != null ? it.Title : "Header")
.Select(x => new Any(x))
.Subscribe(observer));
}
