Great information!

We get the ability to add default value if mapping to enum use non-assigned value.

do you have any idea how we can get default value if the enum is nullable? for example:

final WeekDay? weekDay = null;

// I want to get empty string
final String weekDayShortName = weekDay.shortName;

previously, I use something like this:

enum WeekDay {
  monday
}

// extend nullable WeekDay
extension WeekDayExtension on WeekDay? {
  String get shortName {
    switch (this) {
      case WeekDay.monday:
        return 'Mon';
      case null:
        return '';
    }
  }
}