Does txn.fetch guarantees the same order as the given keys? #369

https://github.com/GoogleCloudPlatform/java-docs-samples/blob/master/datastore/src/main/java/com/google/datastore/snippets/Concepts.java#L779

It might be possible that txn.fetch doesn't guarantee that the order of the result is the same as the given keys. Please close if it does, but please fix this otherwise.