code: def fetch(self):
          
          params = values.of({})
  
          payload = self._version.fetch(
              'GET',
              self._uri,
              params=params,
          )
  
          return FunctionVersionInstance(
              self._version,
              payload,
              service_sid=self._solution['service_sid'],
              function_sid=self._solution['function_sid'],
              sid=self._solution['sid'],
          )
docs: Fetch a FunctionVersionInstance
  
          :returns: Fetched FunctionVersionInstance
          :rtype: twilio.rest.serverless.v1.service.function.function_version.FunctionVersionInstance