When migrating stock, some dummies methods have been removed. Indeed those
calls make more problems than they solve by adding unnecessary complexity
around simple methods. However it seems some calls have been left in the
process :
- _get_act_window_dict which is basically an env.ref or act_window.for_xml_id
- _get_products which is basically having all product_ids from template by
iterating on product_variant_ids.