- return MoreObjects.toStringHelper(Envelope.class).add("sequence", Long.toUnsignedString(sequence, 16)).
- add("retry", retry).add("message", message).toString();
+ return MoreObjects.toStringHelper(Envelope.class).add("sessionId", Long.toHexString(sessionId))
+ .add("txSequence", Long.toHexString(txSequence)).add("message", message).toString();