$ grep -E "belongs_to|has_many" 2
__PACKAGE__->belongs_to('density', 'RPG::Traveller::DB::Schema::density');
__PACKAGE__->belongs_to('sector', 'RPG::Traveller::DB::Schema::sector');
__PACKAGE__->has_many('get_subsector', 'RPG::Traveller::DB::Schema::subsector', 'sector');
__PACKAGE__->has_many('get_subsector', 'RPG::Traveller::DB::Schema::subsector', 'density');