org-dartlang-testcase:///main.dart:
import "foo.dart";
int get giveInt => 43;
var x = "hello".giveInt;


org-dartlang-testcase:///foo.dart:
extension Foo on String {
  int get giveInt => 42;
}
extension BarExtension on Bar {
  int get giveInt => 42;
}
class Bar {}