# Pastebin G24l8JVW
	has Set $!dirty;

	method BUILDALL(|) {
		for ::?CLASS!attr-columns -> $attr {
			my $attr-name = $attr.name.substr(2);
			my $dirt = sub {
				$!dirty ∪= $attr-name;
			};
			with ::?CLASS.^find_method($attr-name) {
				.wrap: method () {
					my $value := callsame;
					Proxy.new:
						FETCH => method () {$value},
						STORE => method ($val) {
							$dirt();
							$value = $val
						},
					;
				}
			}
		}
		nextsame
	}