This accepts a value like “views/parts” and is later converted into a part_namespace on application views, with the namespace being looked up relative to the view’s containing slice or application. For example, for a view In the Main slice, the resulting part_namespace would become Main::Views::Parts.
timriley
commented
4 years ago 
This accepts a value like “views/parts” and is later converted into a
part_namespaceon application views, with the namespace being looked up relative to the view’s containing slice or application. For example, for a view In theMainslice, the resultingpart_namespacewould becomeMain::Views::Parts.