private com.google.protobuf.SingleFieldBuilderV3<
            com.google.protobuf.Timestamp,
            com.google.protobuf.Timestamp.Builder,
            com.google.protobuf.TimestampOrBuilder>
        getNegativeExpireTimeFieldBuilder() {
      if (negativeExpireTimeBuilder_ == null) {
        negativeExpireTimeBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.protobuf.Timestamp,
                com.google.protobuf.Timestamp.Builder,
                com.google.protobuf.TimestampOrBuilder>(
                getNegativeExpireTime(), getParentForChildren(), isClean());
        negativeExpireTime_ = null;
      }
      return negativeExpireTimeBuilder_;
    }
<pre>
For requested entities that did not match the threat list, how long to
cache the response until.
</pre>

<code>.google.protobuf.Timestamp negative_expire_time = 2;</code>
java-webrisk/proto-google-cloud-webrisk-v1/src/main/java/com/google/webrisk/v1/SearchHashesResponse.java