Super class code completion

[cedvdb]

Currently when extending a class it is very tedious to pass each parameters to the super constructor.

This feature dart-lang/language#1855 will resolve most of the verbosity, however code completion should go a step further and be able to generate a constructor with super parameters

class House {
  final int windows;
  House({required this.windows});
}

class TestHouse extends House {
   // proposed, compiles
   TestHouse({super.windows});
   // alternatively
   TestHouse({int windows}) : super(windows: windows);
   // currently, which does not compile
   TestHouse() : super()
}

[DanTup]

Fixed by dart-lang/sdk@8e40705, with dart-lang/sdk#47979 raised about supporting super initializers when available.

Thanks!