private com.google.protobuf.SingleFieldBuilderV3<
            com.google.webrisk.v1.RiceDeltaEncoding,
            com.google.webrisk.v1.RiceDeltaEncoding.Builder,
            com.google.webrisk.v1.RiceDeltaEncodingOrBuilder>
        getRiceIndicesFieldBuilder() {
      if (riceIndicesBuilder_ == null) {
        riceIndicesBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.webrisk.v1.RiceDeltaEncoding,
                com.google.webrisk.v1.RiceDeltaEncoding.Builder,
                com.google.webrisk.v1.RiceDeltaEncodingOrBuilder>(
                getRiceIndices(), getParentForChildren(), isClean());
        riceIndices_ = null;
      }
      return riceIndicesBuilder_;
    }
<pre>
The encoded local, lexicographically-sorted list indices, using a
Golomb-Rice encoding. Used for sending compressed removal indices. The
removal indices (uint32) are sorted in ascending order, then delta encoded
and stored as encoded_data.
</pre>

<code>.google.cloud.webrisk.v1.RiceDeltaEncoding rice_indices = 2;</code>
java-webrisk/proto-google-cloud-webrisk-v1/src/main/java/com/google/webrisk/v1/ThreatEntryRemovals.java