The model's pending overlay, or null when it has none.
Null is the answer for every model that was only ever read: the backend
creates the view lazily on the first mutation, so an unedited session pays
nothing and every caller keeps its original store-only path.
The model's pending overlay, or
nullwhen it has none.Null is the answer for every model that was only ever read: the backend creates the view lazily on the first mutation, so an unedited session pays nothing and every caller keeps its original store-only path.