useDeterministicOrdering

Note that the deterministic serialization is NOT canonical across languages. It is NOT guaranteed to remain stable over time. It is unstable across different builds with schema changes due to unknown fields. Users who need canonical serialization (e.g., persistent storage in a canonical form, fingerprinting, etc.) should define their own canonicalization specification and implement their own serializer rather than relying on this API.

If deterministic serialization is requested, map entries will be sorted by keys in lexicographical order. This is an implementation detail and subject to change.