public Builder setExpireTime(com.google.protobuf.Timestamp value) {
        if (expireTimeBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          expireTime_ = value;
        } else {
          expireTimeBuilder_.setMessage(value);
        }
        bitField0_ |= 0x00000004;
        onChanged();
        return this;
      }
<pre>
The cache lifetime for the returned match. Clients must not cache this
response past this timestamp to avoid false positives.
</pre>

<code>.google.protobuf.Timestamp expire_time = 3;</code>
java-webrisk/proto-google-cloud-webrisk-v1beta1/src/main/java/com/google/webrisk/v1beta1/SearchHashesResponse.java