module test {
    static service Singleton {
        private Int counter;
        String fooHasBeenCalled() {
            return $"{++counter} times";
        }
    }

    void run() {
        @Inject Console console;
        for (Int i : 1..5) {
            console.print($"{Singleton.fooHasBeenCalled()=}");
        }
    }
}