Quick Assist for super in extension methods

[ChristianKleineidam]

It frequently happens that I add another final variable to a class like:

class Foo{
  final String a;
  final String b;

  Foo(this.a);
}

In this case I helpfully get a quick assist to create:

class Foo {
  final String a;
  final String b;

  Foo(this.a, this.b);
}

If I however also have an extension class, I have an error as super only provides a and not b.

class Moo extends Foo {
  Moo(String a) : super(a);
}

In this case I have an error but currently no Quick Assist. It would be helpful to have a quick assist that creates:

class Moo extends Foo {
  Moo(String a, String b) : super(a, b);
}

[lrhn]

Sounds like a general case where, if a subclass constructor doesn't forward all necessary parameters to the superclass constructor, a quick-fix could add an extra required parameter and forward it to the super-class. Could make the parameter named if it's named in the superclass and the subclass doesn't already have optional positional parameters.

[bwilkerson]

For future reference, the diagnostic code being produced here is not_enough_positional_arguments.