code: def on_backup_degradation(self, degraded_backups) -> None:
          '''
          The method for sending BackupInstanceFaulty messages
          if backups instances performance were degraded
          :param degraded_backups: list of backup instances
          ids which performance were degraded
          :return:
          '''
          self.__remove_replicas(degraded_backups,
                                 Suspicions.BACKUP_PRIMARY_DEGRADED,
                                 self.node.config.REPLICAS_REMOVING_WITH_DEGRADATIONf on_backup_degradation(self, degraded_backups) -> None:
          '''
          The method for sending BackupInstanceFaulty messages
          if backups instances performance were degraded
          :param degraded_backups: list of backup instances
          ids which performance were degraded
          :return:
          '''
          self.__remove_replicas(degraded_backups,
                                 Suspicions.BACKUP_PRIMARY_DEGRADED,
                                 self.node.config.REPLICAS_REMOVING_WITH_DEGRADATION)
docs: The method for sending BackupInstanceFaulty messages
          if backups instances performance were degraded
          :param degraded_backups: list of backup instances
          ids which performance were degraded
          :return: