- There will be no `coroutine` keyword for builders
- They accept a special suspend function type instead
(it's return type is straightforward, not Continuation<Unit>)
- Instances of these types may be run with special built-in functions
- These built-ins functions are parametrized
with handleResult/handleException/interceptResume, so these operators
become unnecessary (and controllers too)
NB: `@Suspend` annotation is subject to replace with the `suspend` modifier
on types
Denis Zharkov
1ab003c029