code: def model_builds(self):
          
          if self._model_builds is None:
              self._model_builds = ModelBuildList(self._version, assistant_sid=self._solution['sid'], )
          return self._model_builds
docs: Access the model_builds
  
          :returns: twilio.rest.autopilot.v1.assistant.model_build.ModelBuildList
          :rtype: twilio.rest.autopilot.v1.assistant.model_build.ModelBuildList