my Point $p = Point.new;

$p.gist.put;
$p.set( y => 4 );
$p.gist.put;
$p.y.put;

##</code><code>##

17:44 >raku 2091_SoPW.raku
[0, 0]
[0, 4]
4

18:00 >

##</code><code>##

method set( :$x = $.x, :$y = $.y )

##</code><code>##

$!x = $x; 
$!y = $y;