Should PropertyView subcontext with the correct data before creating the child view?

[adamvy-google]

js/foam/u2/PropertyView.js:63

[adamvy-google]

If the child view imports data from the context, it will receive the incorrect data, and may even make a dynamic binding to it if it imports data$.

If data is going to be in the context, would it make more sense for the PropertyView to construct a sub-context with the appropriate data$ before constructing the view for child_