DescribeRouteServers
	Initialize stack step
		spanInitializeStart
		InterceptExecution
		RegisterServiceMetadata
		legacyEndpointContextSetter
		SetLogger
		spanInitializeEnd
	Serialize stack step
		spanBuildRequestStart
		setOperationInput
		ResolveEndpoint
		InterceptBeforeSerialization
		OperationSerializer
		InterceptAfterSerialization
	Build stack step
		ClientRequestID
		ComputeContentLength
		SetCredentialSourceMiddleware
		UserAgent
		AddTimeOffsetMiddleware
		RecursionDetection
		spanBuildRequestEnd
	Finalize stack step
		spanRetryLoop
		InterceptBeforeRetryLoop
		Retry
		InterceptAttempt
		RetryMetricsHeader
		ResolveAuthScheme
		GetIdentity
		ResolveEndpointV2
		disableHTTPS
		ComputePayloadHash
		setLegacyContextSigningOptions
		InterceptBeforeSigning
		Signing
		InterceptAfterSigning
	Deserialize stack step
		AddRawResponseToMetadata
		ErrorCloseResponseBody
		CloseResponseBody
		ResponseErrorWrapper
		RequestIDRetriever
		InterceptAfterDeserialization
		OperationDeserializer
		InterceptBeforeDeserialization
		AddTimeOffsetMiddleware
		RecordResponseTiming
		RequestResponseLogger
		InterceptTransmit