John Woo

As part of this PR: https://github.com/aws-amplify/amplify-ios/pull/389 It was brought up that we should be creating our serial queues with the target field. At least two approaches are under consideration 1....

Hi, I noticed that there is a pretty clear example of how to encode flattened xml maps with namespaces located [here](https://github.com/awslabs/smithy/blob/52e46a6af5f455c639202836bcfe80e2397a09ab/smithy-aws-protocol-tests/model/restXml/document-maps.smithy#L441), but there doesn't seem to be one for wrapped...