Remove namespace around service models

[jbelkins]

Describe the feature

Right now, generated service models (other than input & output models and modeled errors) are namespaced under an enum named ...ClientTypes, i.e. S3ClientTypes.AccessControlPolicy. This namespacing creates extra boilerplate in customer code, complicates IDE autocomplete, and generally makes for a worse user experience.

Eliminate this namespace and let models exist in the service's root namespace along with the client. Be sure to code-generate all AWS services to help identify name collisions.

Some non-model types in the service (i.e. those associated with configuration, endpoints, identity & auth, waiters, paginators, etc.) may have to be renamed or placed into a namespace (i.e. under the client) to deconflict model names from others in the service module.

Use Case

To create a better, easier user experience for customers.

Proposed Solution

Eliminate namespace as suggested above.

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change