A while back, we had the following code in our solution:

var associationTypeRepository = context.Locate.Advanced.GetInstance>();

associationTypeRepository.Add(new AssociationGroupDefinition()() { Name = Constants.AssociationTypes.RecommendedProducts });
associationTypeRepository.Add(new AssociationGroupDefinition()() { Name = Constants.AssociationTypes.Accessory });

...which added associationTypes to product relations. When importing a bunch of products, these were used. Also, we created stuff manually to set them. Worked fine.

Then, a few versions ago, this class (AssociationGroupDefinition) was marked as obsolete with the message "This is no longer in use.". No explanation to what, where, why and how to proceed. Nothing is explained in documentation as far as I and Google can find out either.

Changed to "RelationGroupDefinition", wich kindof seems to work, but on new products/variants now I only get "Default" in the dropdown list. On products that have one of the two others already, I can still choose between them.

http://world.episerver.com/Documentation/Items/Developers-Guide/EPiServer-Commerce/75/Catalogs/Product-associations-relations/ <= this article says ">You can define association keys in Commerce Manager." in one of the code examples. But where? I can't find it, at least...

This is limiting our client in his getting-ready for launch, and with only two weeks left and plenty to do, this is the last kind of bug we need. When doing such changes, mark classes as Obsolete with the second parameter set to true so we cant avoid it, and tell us how to replace things in the obsolete-message.

...so now what?