code: def fields(self):
          
          if self._fields is None:
              self._fields = FieldList(
                  self._version,
                  assistant_sid=self._solution['assistant_sid'],
                  task_sid=self._solution['sid'],
              )
          return self._fields
docs: Access the fields
  
          :returns: twilio.rest.autopilot.v1.assistant.task.field.FieldList
          :rtype: twilio.rest.autopilot.v1.assistant.task.field.FieldList