@Override
        public void addAnnotationKey(AnnotationKey annotationKey) {
            Objects.requireNonNull(annotationKey, "annotationKey");

            // local check
            annotationKeyChecker.check(annotationKey, provider);
            annotationKeys.add(annotationKey);
        }
@author Jongho Moon
@author HyunGil Jeong
commons-profiler/src/main/java/com/navercorp/pinpoint/common/profiler/trace/TraceMetadataLoader.java