docs: def get_one_time_boot(self):
          """Retrieves the current setting for the one time boot.
  
          :returns: Returns boot device that would be used in next
                    boot. Returns 'Normal' if no device is set.
          """
          sushy_system = self._get_sushy_system(PROLIANT_SYSTEM_ID)
          if (sushy_system.boot.enabled == sushy.BOOT_SOURCE_ENABLED_ONCE):
              return DEVICE_REDFISH_TO_COMMON.get(sushy_system.boot.target)
          else:
              # value returned by RIBCL if one-time boot setting are absent
              return 'Normal'