@java.lang.Override
  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
    for (int i = 0; i < rawHashes_.size(); i++) {
      output.writeMessage(1, rawHashes_.get(i));
    }
    if (((bitField0_ & 0x00000001) != 0)) {
      output.writeMessage(2, getRiceHashes());
    }
    getUnknownFields().writeTo(output);
  }
<pre>
The encoded 4-byte prefixes of SHA256-formatted entries, using a
Golomb-Rice encoding. The hashes are converted to uint32, sorted in
ascending order, then delta encoded and stored as encoded_data.
</pre>

<code>.google.cloud.webrisk.v1beta1.RiceDeltaEncoding rice_hashes = 2;</code>
java-webrisk/proto-google-cloud-webrisk-v1beta1/src/main/java/com/google/webrisk/v1beta1/ThreatEntryAdditions.java