try { tracestate = Tracestate.fromString(StringUtils.join(tracestateList, ","));
try { tracestate = Tracestate.fromString(Joiner.on(",").join(tracestateList));
Tracestate incomingTracestate = Tracestate.fromString(tracestate);
Tracestate incomingTracestate = Tracestate.fromString(tracestate);