class Dot {
    has $.x;
    has $.y;
    has $!z;

    # Fancy syntax which simply sets each private variable.
    submethod BUILD(:$!x, :$!y, :$!z) {
        say "Initializing!";
    }

    method get {
        return ($!x, $!y, $!z);
    }
};

my $a = Dot.new(x => 23, y => 42, z => 2);
say $_ for $a.get;

##</code><code>##

    # Blindly accept x and y, but do extra checks on z:
    submethod BUILD(:$!x, :$!y, :$z) {
        say "Initializing!";
        die "z too big!" if $z > 10;
        $!z = $z;
    }