could support static extension?

[Silentdoer]

class Foo {
  String name = "aa";
  static String prop = "bbb";
}

static extension FooExt on Foo {
  void aaa() {
    print(prop)
  }

  static bbb() {
    print("sss")
  }
}

main() {
  Foo.aaa(); // prints bbb
  FooExt.bbb();  // prints sss
}

[Wdestroier]

It's similar to #723, which is already in the language funnel!* It looks like what you want, but now I remember seeing a slightly different issue. The static modifier before the extension keyword would mean all members are static, I guess. Can we remove it or would it mean extension on Type<T>?

extension FooExt on Foo {
  aaa() => print(prop)
  static bbb() => print("sss")
}

[lrhn]

I'm closing this as a duplicate of #723. The syntax suggested here isn't better, I'd rather have static extension ... be a normal extension where static members are also available on the target type (which must be a type that can have statics).