@Override
    public Set<Characteristics> characteristics() {
        return Collections.unmodifiableSet(EnumSet.of(Characteristics.CONCURRENT, Characteristics.UNORDERED));
    }
Work for {@link ProfileAnalyzer} to analyze.
oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/profiling/trace/analyze/ProfileAnalyzeCollector.java