How to create the MVVM DockLayoutManager using LayoutAdapter

To build an MVVM DockLayoutManager, populate the DockLayoutManager items source and specify where generated elements will appear. There are two ways to do this:
1. dxd:MVVMHelper.LayoutAdapter
2. IMVVMDockingProperties 

This example shows the first approach, the second one you can see in the E20026: How to use the IMVVMDockingProperties interface in an MVVM application example. (example description)