How do I use Dart extension functions?

Question

Dart 2.6 introduces a new language feature called \"static extension members\".
However, I do not quite understand how to use it.

I would like t

Answer 1

Dart 2.7 introduced new Extension Method concept.

https://dart.dev/guides/language/extension-methods

extension ParseNumbers on String {
    int parseInt() {
        return int.parse(this);
    }
    double parseDouble() {
        return double.parse(this);
    }
}
main() {
    int i = '42'.parseInt();
    print(i);
}