https://learn.microsoft.com/en-us/uwp/api/windows.ui.xaml.uielement.populatepropertyinfooverride?view=winrt-28000
UIElement.PopulatePropertyInfoOverride(String, AnimationPropertyInfo) Method (Windows.UI.Xaml) -...
When overridden in a derived class, defines a property that can be animated.
stringmethodwindowsuixaml