Additional examples

- [ ] Sharing the same client supplier between KMS keyrings, so that only one client will be created for each region and shared among all of those keyrings

- [ ] Making your own client supplier to whitelist/blacklist particular sets of regions.

- [ ] Having multiple caching CMMs share the same local cache, with comments as to why that would be done

- [ ] Example to consume the keyring trace, after we have come up with a good use case for why we would actually want to do that