{ proxy => [ qw/notes/ ] },
);
__PACKAGE__->many_to_many( producers => cd_to_producer => 'producer' );
-__PACKAGE__->many_to_many( other_producers => cd_to_producer => 'other_producer' );
__PACKAGE__->many_to_many(
producers_sorted => cd_to_producer => 'producer',
{ order_by => 'producer.name' },