Error handling (assert, exception, optional, expected)
Slides​
https://docs.google.com/presentation/d/1EAYLXUhCLn8JVTsFs29fk0hH2zlfpeTlGRb7PWnqxWM/edit?usp=sharing
https://docs.google.com/presentation/d/1EAYLXUhCLn8JVTsFs29fk0hH2zlfpeTlGRb7PWnqxWM/edit?usp=sharing