CodedOutputStream output(&stream);
    output.SetSerializationDeterministic(true);
    message.SerializeToCodedStream(&output);
  }
  return serialized_message;
}

absl::StatusOr<uint64_t> HashFields(
    const ChunkedMessage& chunked_message,
    riegeli::RecordReader<riegeli::FdReader<>>& reader,
    const std::vector<ChunkInfo>& chunks_info,

namespace tensorflow::saved_model::fingerprinting {

namespace {

using fingerprinting_utils_internal::fieldTagMatches;
using fingerprinting_utils_internal::HashFields;
using fingerprinting_utils_internal::HashGraphDef;
using fingerprinting_utils_internal::HashSavedObjectGraph;
using fingerprinting_utils_internal::HashSignatureDef;
using fingerprinting_utils_internal::PruneChunkedMessage;

std::string SerializeProto(const Message& message);

// Uses metadata contained in `chunked_message` to hash fields within the
// data accessed by the `reader` using `chunks_info`.
absl::StatusOr<uint64_t> HashFields(
    const ::tensorflow::proto_splitter::ChunkedMessage& chunked_message,
    riegeli::RecordReader<riegeli::FdReader<>>& reader,
    const std::vector<::tensorflow::proto_splitter::ChunkInfo>& chunks_info,