https://stackoverflow.com/questions/16688054/dart-named-parameters-using-a-map?rq=1

dynamic_kwargs.dart

void printKwargs({
  String string = 'default',
  bool boolean = false,
  int integer = 1,
}) {
  print([string, boolean, integer]);
}

Map<Symbol, dynamic> symbolizeKeys(Map<String, dynamic> map) =>
    map.map((key, value) => MapEntry(Symbol(key), value));

void main() {
  final a = {
    'integer': 10,
    'string': 'non-default string',
  };

  Function.apply(printKwargs, [], symbolizeKeys(a));
}

Can you pass a constructor to Function.apply()?

@hurelhuyag I would guess so if tear-off constructors have been implemented in the language, but I haven't done much with dart in a while.