Moo handles => 'Role' not working - perl

Question

For the life of me I can't figure out why this is not working the way the documentation says it should. I have Googled the problem SO searched, looked at the source, etc. Is this a bug or am I doing something wrong that I just can't see.
Here is the code:
#!/usr/bin/env perl
use strict;
use warnings;
package Model;
use Moo::Role;
has ObjectID => (
is => 'rw'
);
package Object;
use Moo;
use namespace::clean;
has model => (
is => 'rw',
handles => 'Model'
);
package main;
my $xo = Object->new;
$xo->ObjectID(12345);
exit;
attempt to run
perl -MCarp::Always t/moohandles.t
and get this
Attempted to access 'model' but it is not set at (eval 26) line 20.
Object::_assert_model('Object=HASH(0x1dfd118)') called at (eval 25) line 17
Object::ObjectID('Object=HASH(0x1dfd118)', 12345) called at t/moohandles.t line 27

Answer 1

Delegation essentially expands the $xo->ObjectID method call to $xo->model->ObjectID. But $xo->model is currently unset. You probably want to default it to an object that consumes the Model role.
Something like this:
use strict;
use warnings;
{
package Model;
use Moo::Role;
has ObjectID => (
is => 'rw',
);
}
{
package ModelClass;
use Moo;
with 'Model';
}
{
package Object;
use Moo;
has model => (
is => 'rw',
handles => 'Model',
builder => sub { ModelClass->new },
);
}
my $xo = Object->new;
$xo->ObjectID(12345);
print $xo->ObjectID, "\n";