code: def echo(self, args):
          
          if args.get('sleep'):
              time.sleep(args.get('sleep'))
          if args.get('message') is not None:
              return args.get('message')
docs: An echo function
  
              An API test function which simply echoes what is is passed in the
              'message' element in the args-dict..
  
              Valid keys in the `args`-struct:
  
              * `auth` [struct]
                  Authentication options passed to the :class:`AuthFactory`.
              * `message` [string]
                  String to echo.
              * `sleep` [integer]
                  Number of seconds to sleep before echoing.
  
              Returns a string.