NOTE: In this sample, the views are stacked, and the buttons above allow switching between the views. The initial state should show a flat list in a Table View with only the middle button enabled. When drilling down to a graph (e.g., Demo Topology), the Topology View should be shown (with all three buttons enabled). When drilling down to a flat list of data (e.g., Demo Navigation Hint) the Table View should be shown (with only the middle button enabled).