find an available tcp port .

Makes network calls to other services (text-class, nias), and returns the response payload as bytes, or an error method - http method to invoke (post/put/get etc.) header - map of headers to include in request body - reader for any content to supply as request body .

generate a unique id - nuid in this case .

generate a short useful unique name - hashid in this case .

small utility function embedded in major ops to print a performance indicator.