code: def __init__(
      self,
      index_name: str,
      settings: PartitionSettings,
      store_config: StoreConfig,
      **kwargs: Any,
  ) -> None:
      super(dict).__init__()
      self._ddtype = kwargs.get("ddtype", None)
      self.is_crashed = store_config.is_crashed
  
imports: from typing import Any
  from typing import Type
  from syft.serde.serializable import serializable
  from syft.store.document_store import DocumentStore
  from syft.store.document_store import PartitionSettings
  from syft.store.document_store import StoreConfig
  from syft.store.kv_document_store import KeyValueBackingStore
  from syft.types.syft_object import SyftObject
  from syft.types.uid import UID
label_desc: Use image node_id 1 to create a new MockKeyValueBackingStore object from inherited base classes: dict, KeyValueBackingStore with example: obj = MockKeyValueBackingStore(index_name, settings, store_config)