I've used this technique to check if I have called any `->with()` or other relations loaded on a model. I had a need for this since I have a lot of methods that require relation data in order to generate an appended property on the model. For example, if I want to pull all of the recent Posts of an Author and I want to store it on the model as `posts_this_month`, I would need to have Posts relation loaded. I want to force myself to eager load that data before I try to access it, otherwise I could run into an n+1 problem.