This isn't the full job, notably Operations are still sprinkled about, and having some code sharing between `service` and `service_internal` would be nice, but that is sketchy without the explicitness of Rust's traits.
Reviewed-on: #196
Co-authored-by: Quaternions <krakow20@gmail.com>
Co-committed-by: Quaternions <krakow20@gmail.com>
