// @dart = 2.9
class Class1 {
  int operator []=(a, b) {}
  int set setter1(_) {}
}

class Class2 {
  dynamic operator []=(a, b) {}
  dynamic set setter2(_) {}
}

class Class3 {
  void operator []=(a, b) {}
  void set setter3(_) {}
}

class Class4 {
  operator []=(a, b) {}
  set setter4(_) {}
}

dynamic set setter2(_) {}
int set setter1(_) {}
main() {}
set setter4(_) {}
void set setter3(_) {}