public Builder clearNegativeExpireTime() {
      bitField0_ = (bitField0_ & ~0x00000002);
      negativeExpireTime_ = null;
      if (negativeExpireTimeBuilder_ != null) {
        negativeExpireTimeBuilder_.dispose();
        negativeExpireTimeBuilder_ = null;
      }
      onChanged();
      return this;
    }
<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-v1beta1/src/main/java/com/google/webrisk/v1beta1/SearchHashesResponse.java