@Override
    protected void toString(final StringBuilder sb) {
        super.toString(sb);
        if (stream != null) {
            sb.append(", stream=");
            sb.append(stream.getId());
        }
    }
TODO: MAKE OPTIONAL FALSE AFTER Stroom 4.0 RELEASE WHEN REMOVING STREAM
PROCESSOR AND PRIORITY
stroom-legacy/stroom-legacy-model_6_1/src/main/java/stroom/legacy/model_6_1/StreamTask.java