getPersistentCacheIndexManagerReturns the PersistentCache Index Manager used by the given Firestore object. function getPersistentCacheIndexManager(firestore: Firestore): PersistentCacheIndexManager | null;§getPersistentCacheIndexManager(firestore: Firestore): PersistentCacheIndexManager | null[src]§Parameters§firestore: Firestore[src]§Return Type§PersistentCacheIndexManager | null[src]The PersistentCacheIndexManager instance, or null if local persistent storage is not in use.