public com.google.protobuf.TimestampOrBuilder getNegativeExpireTimeOrBuilder() {
      if (negativeExpireTimeBuilder_ != null) {
        return negativeExpireTimeBuilder_.getMessageOrBuilder();
      } else {
        return negativeExpireTime_ == null
            ? com.google.protobuf.Timestamp.getDefaultInstance()
            : negativeExpireTime_;
      }
    }
<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