class Class1 {
  Class1(this.field);
  String toString() => 'Class1($field)';
  int field;
}

class Class2 {
  Class2(this.field);
  String toString() => 'Class2($field)';
  int field;
}

expect(expected, actual) {}

extension Extension1 on Class1 {
  int genericMethod<T extends num>(T t) {}
  int method() {}
}

extension Extension2 on Class2 {
  int genericMethod<T extends num>(T t) {}
  int method() {}
}

main() {}
testExtension1() {}
testExtension2() {}