rollback method
void
rollback()
Implementation
void rollback() {
_batch = NimbostratusWriteBatch(batch: _firestore.batch());
// Rollback all optimistic snaps in the reverse order they were applied.
for (final optimisticSnap in _batchOpimisticSnapshots.reversed) {
_documents[optimisticSnap.reference.path]!.rollback(optimisticSnap);
}
}