Flutter/Dart - Regex that checks if password has at least specialCount special character matches

DartGist5.dart

//Checks if password has at least specialCount special character matches
bool hasMinSpecialChar(String password, int specialCount) {
  String pattern =
      r"^(.*?[$&+,\:;/=?@#|'<>.^*()%!-]){" + specialCount.toString() + ",}";
  return password.contains(new RegExp(pattern));
}