docs: def _get_smart_storage_config_by_controller_model(self, controller_model):
          """Returns a SmartStorageConfig Instance for controller by model.
  
          :returns: SmartStorageConfig Instance for controller
          """
          ac = self.smart_storage.array_controllers.array_controller_by_model(
              controller_model)
          if ac:
              for ssc_id in self.smart_storage_config_identities:
                  ssc_obj = self.get_smart_storage_config(ssc_id)
                  if ac.location == ssc_obj.location:
                      return ssc_obj