", smithyhttp.NewStackRequest)  options := c.options.Copy()  for _, fn := range optFns {   fn(&options)  }  addawsAwsquery_serdeOpCreateDBInstanceReadReplicaMiddlewares(stack)  awsmiddleware.AddRequestInvocationIDMiddleware(stack)  smithyhttp.AddContentLengthMiddleware(stack)  AddResolveEndpointMiddleware(stack, options)  v0.AddComputePayloadSHA000Middleware(stack)  retry.AddRetryMiddlewares(stack, options)  addHTTPSignerV0Middleware(stack, options)  awsmiddleware.AddAttemptClockSkewMiddleware(stack)  addClientUserAgent(stack)  smithyhttp.AddErrorCloseResponseBodyMiddleware(stack)  smithyhttp.AddCloseResponseBodyMiddleware(stack)  