At the end of the A recap on Scala 2 - Akka Typed - Dotty chapter, about 4 slides explain an Actor's protocol and the utilisation of message wrappers and adapters.
It's better to move these to the chapter on Union Types for two reasons:
It shortens the already quite long recap chapter
It gives information about message adapters at the moment where this is useful for solving the exercise in the chapter on Union Types
At the end of the A recap on Scala 2 - Akka Typed - Dotty chapter, about 4 slides explain an Actor's protocol and the utilisation of message wrappers and adapters. It's better to move these to the chapter on Union Types for two reasons: