private com.google.protobuf.SingleFieldBuilderV3<
            com.google.webrisk.v1.RiceDeltaEncoding,
            com.google.webrisk.v1.RiceDeltaEncoding.Builder,
            com.google.webrisk.v1.RiceDeltaEncodingOrBuilder>
        getRiceHashesFieldBuilder() {
      if (riceHashesBuilder_ == null) {
        riceHashesBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.webrisk.v1.RiceDeltaEncoding,
                com.google.webrisk.v1.RiceDeltaEncoding.Builder,
                com.google.webrisk.v1.RiceDeltaEncodingOrBuilder>(
                getRiceHashes(), getParentForChildren(), isClean());
        riceHashes_ = null;
      }
      return riceHashesBuilder_;
    }
<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.v1.RiceDeltaEncoding rice_hashes = 2;</code>
java-webrisk/proto-google-cloud-webrisk-v1/src/main/java/com/google/webrisk/v1/ThreatEntryAdditions.java