This is based on the use of Shopify's packwerk.
Asuming we have a posting pack with a Post model and a commenting pack with a Comment model, and
we want the commenting pack to have a declared dependency on the posting pack, then here's a pattern
to avoid the has_many :comments usual declaration on the Post model while still being able to have
very similar functionality to the dependent option to react/restrict when a post is destroyed.
If you need to fetch a post's comments, you can simply use Comments.where(post: @post) instead of the