super-initializer.dart

// Imagine you have code like this:
class Employee {
  final double salary;
  Employee(this.salary);
}

class SoftwareEngineer extends Employee {
  final String level;
  SoftwareEngineer(final double salary, this.level) : super(salary);
}


// Super initializers, a new language feature in Dart 2.17, 
// allow you to express SoftwareEngineer's constructor in a more condensed style:

class SoftwareEngineer extends Employee {
  final String level;
  SoftwareEngineer(super.salary, this.level);
}

implement super initializers