public com.google.protobuf.Timestamp.Builder getExpirationTimeBuilder() {
      bitField0_ |= 0x00000002;
      onChanged();
      return getExpirationTimeFieldBuilder().getBuilder();
    }
<pre>
The expiration time of the token.
</pre>

<code>.google.protobuf.Timestamp expiration_time = 2;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/GenerateStreamHlsTokenResponse.java