@Override
    public AnnotationKeyLocator getAnnotationKeyLocator() {
        return annotationKeyRegistry;
    }
@author Woonduk Kang(emeroad)
@author HyunGil Jeong
@author Taejin Koo
commons-server/src/main/java/com/navercorp/pinpoint/common/server/util/ServerTraceMetadataLoaderService.java