ProductVariant.pm

package MyContainer;
use 5.010;
use Moose;
use Bread::Board::Declare;
 
sub instance {
    state $locator = __PACKAGE__->new;
    return $locator;
}
 
has config => (
    isa       => 'Config::Merge',
    is        => 'ro',
    lifecycle => 'Singleton'
    block     => sub { Config::Merge->new('/path/to/config'); },
):

has conn => (
  isa          => 'DBIx::Connector',
  dependencies => [ qw( config ) ],
  lifecycle    => 'Singleton',
  handles      => ['dbh'],
  block        => sub {
       my $s = shift;
       my $config = $s->param('config');
                 return DBIx::Connector->new( $config->('db.dsn'), $config->('db.user'), $config->('db.pass') );
            },
        );
    },
);
 
package Role::Locator;
...
use Module::Runtime qw( use_module );
 
has _locator_class => (
    isa      => 'Str',
    is       => 'ro',
    lazy     => 1,
    default  => sub { 'MyContainer' },
);
 
 has _locator => (
    isa      => 'Bread::Board::Container',
    is       => 'ro',
    lazy     => 1,
    default  => sub { use_module( $self->_locator_class )->instance },
);
 
package ProductVariant;
with 'Role::Locator';
 
sub _load_categories {
...
     my $dbh = $self->_locator->dbh;
}