dart - How to make a named method parameter required Flutter?

Question

void checkIfAllValsAreIn(
    { Map<> map,
    bool isBool,
    Function() callback}) async {...}

How do I make any one of these named parameters required when called?

Answer 1

Make them @required

import 'package:meta/meta.dart';
void checkIfAllValsAreIn(
    { @required Map<> map,
    @required bool isBool,
    @required Function() callback}) async {...}