git clone git@github.com:tobyink/misc-versioned-library-example-p5.git
cd misc-versioned-library-example-p5
curl -fsSL --compressed https://git.io/cpm | perl - install
perl -Ilocal example.pl

##</code><code>##

#!/usr/bin/env perl

use strict;
use warnings;
use feature 'say';

use portable::lib './lib';
use portable::alias 'Foo-1.0' => 'FooOld';
use portable::alias 'Foo-1.1' => 'Foo';

# Foo 1.0
my $bar = FooOld->new_bar( name => 'X', desc => 'Y' );
say $bar->desc;

# Foo 1.1 changed 'desc' to 'description'
$bar = Foo->new_bar( name => 'X', description => 'Y' );
say $bar->description;

##</code><code>##

use strict;
use warnings;

return {
	version => '1.1',
	class => {
		'Bar' => {
			has => {
				'name'        => { type => 'Str' },
				'description' => { type => 'Str' },
			},
		},
	},
}

##</code><code>##

		'Bar' => {
			has => {
				'name'        => { type => 'Str' },
				'description' => { type => 'Str' },
			},
			can => {
				'do_something' => sub { my $self = shift; return 42 },
			},
		},