Use wrapper
Description
Enables wrapping custom HTML around the ViewBox control's Layout.
Discussion
The ViewBox layout can be wrapped in a template containing sticky (i.e. non-scrolling) content. For example, a wrapper can be used to add a sticky header to the top of the ViewBox. As the ViewBox content is scrolled, the header remains fixed in place.
This property exposes the Wrapper HTML and Wrapper initialization javascript properties when enabled.