class Hamper {
    has $.name = 'Christmas Basket';
    has Str @!items;

    method TWEAK(){
        self.items = 'Mince Pie', 'White Wine', 'Stinky Cheese' unless @!items;
    }

    method items() is rw {
        return-rw Proxy.new:
            FETCH => sub ($) { return @!items },
            STORE => sub ($, @items) {
                die "Wrong length" unless @items.elems == 3;
                @!items = @items;
            };
    }
}

my $hamper = Hamper.new;

# $hamper.items = 'Mince Pie', 'White Wine', 'Stinky Cheese', 'Dogfood';

say "Name: " ~ $hamper.name;
say "Items: " ~ $hamper.items;