Generate SDK with non-optional output members when the @required trait is applied

[jbelkins]

Describe the feature

Output models should be generated with non-optional Swift properties for members having the @required trait.

• Models should continue to be optional under the hood / in private Swift properties. Presence of required members should be checked during deserialization, and then force-unwrapped by a public accessor when the customer accesses the member.
• There should be a mechanism for Trebuchet to identify a breaking API change related to the required trait, and the SDK will major version that service as needed.
• Models that are used as both input and output may have non-optional getters; this is okay since customers should not use getters when preparing a request for input.

Use Case

To make best use of Swift language features by exposing required members as non-optional.

Proposed Solution

No response

Other Information

No response

Acknowledgements

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