Trace getResponseTrace() {
        Inspector trace = getResponseField(RESPONSE_TRACE);
        return trace.valid() ? Trace.fromSlime(trace) : Trace.createDummy();
    }
Contains response data for a slime response and methods for decoding the response data that
are common to all {@link Slime} based config requests.

@author Ulf Lilleengen
config/src/main/java/com/yahoo/vespa/config/protocol/SlimeResponseData.java