message: Reference issue for unsupported media type
diff: @@ -32,6 +32,7 @@ pub enum RuntimeErrorKind {
  /// As of writing, this variant can only occur upon failure to extract an
  /// [`crate::extension::Extension`] from the request.
  InternalFailure(crate::Error),
  + // TODO(https://github.com/awslabs/smithy-rs/issues/1663)
  // UnsupportedMediaType,
  NotAcceptable,
  }
  