code: def restore_replicas(self) -> None:
          '''
          Restore removed replicas to requiredNumberOfInstances
          :return:
          '''
          self.backup_instances_faulty.clear()
          for inst_id in range(self.node.requiredNumberOfInstances):
              if inst_id not in self.node.replicas.keys():
                  self.node.replicas.add_replica(inst_idf restore_replicas(self) -> None:
          '''
          Restore removed replicas to requiredNumberOfInstances
          :return:
          '''
          self.backup_instances_faulty.clear()
          for inst_id in range(self.node.requiredNumberOfInstances):
              if inst_id not in self.node.replicas.keys():
                  self.node.replicas.add_replica(inst_id)
docs: Restore removed replicas to requiredNumberOfInstances
          :return: