class_docstr: Instance storage stores the states of instances in the storage. It also
  allows users to subscribe to instance status changes to trigger reconciliation
  with cloud provider.
docstr: Delete instances from the storage. If the expected_version is
  specified, the update will fail if the current storage version does not
  match the expected version.
  
  Args:
      to_delete: A list of instances to be deleted.
      expected_version: The expected storage version.
  
  Returns:
      StoreStatus: A tuple of (success, storage_version).
docstr_tok: ["Delete","instances","from","the","storage",".","If","the","expected_version","is","specified",",","the","update","will","fail","if","the","current","storage","version","does","not","match","the","expected","version",".","Args",":","to_delete",":","A","list","of","instances","to","be","deleted",".","expected_version",":","The","expected","storage","version",".","Returns",":","StoreStatus",":","A","tuple","of","(","success",",","storage_version",")","."]
code: def batch_delete_instances(
      self,
      instance_ids: List[str],
      expected_storage_version: Optional[int] = None,
  ) -> StoreStatus:
      """Delete instances from the storage. If the expected_version is
      specified, the update will fail if the current storage version does not
      match the expected version.
  
      Args:
          to_delete: A list of instances to be deleted.
          expected_version: The expected storage version.
  
      Returns:
          StoreStatus: A tuple of (success, storage_version).
      """
      version = self._storage.get_version()
      if (
          expected_storage_version
          and expected_storage_version != version
      ):
          return StoreStatus(False, version)
  
      result = self._storage.batch_update(
          self._table_name, {}, instance_ids, expected_storage_version
      )
      return result
  
file_path: ray/python/ray/autoscaler/v2/instance_manager/instance_storage.py
imports: import copy
  import logging
  from abc import ABCMeta, abstractmethod
  from typing import Dict, List, Optional, Set, Tuple
  from ray.autoscaler.v2.instance_manager.storage import Storage, StoreStatus
  from ray.core.generated.instance_manager_pb2 import Instance, InstanceUpdateEvent
label_desc: Use image node_id 6 for calling the InstanceStorage obj's underlying member method code with example usage: obj.batch_delete_instances(instance_ids, expected_storage_version) and returns: result, StoreStatus