The source an interruption is entered with. A screen whose navigation the
Simulator models supplies that navigation's source; a screen whose navigation
it does not model — every challenge step today — has no source at all, and the
type makes that absence explicit: turning the step's catalog entry into a
native or bloks one fails to compile until a source is threaded through.
The source an interruption is entered with. A screen whose navigation the Simulator models supplies that navigation's source; a screen whose navigation it does not model — every challenge step today — has no source at all, and the type makes that absence explicit: turning the step's catalog entry into a
nativeorbloksone fails to compile until a source is threaded through.