>>>
bool doStuff(String firstArgX, {String secondArg, String arg3foo, Map<String,
    String> anotherArg, bool yetAnotherArg: false, bool tooManyArgs: true}) {}
<<<
bool doStuff(
  String firstArgX, {
  String secondArg,
  String arg3foo,
  Map<String, String> anotherArg,
  bool yetAnotherArg: false,
  bool tooManyArgs: true,
}) {}