private <K, V> List<String> toStringList(List<Pair<K, V>> list) {
        List<String> result = new ArrayList<>(list.size());
        for (Pair<K, V> pair : list) {
            result.add(toStringPair(pair));
        }
        return result;
    }
@author Jongho Moon
@author jaehong.kim
agent-module/profiler-test/src/main/java/com/navercorp/pinpoint/profiler/test/TestDataSender.java