public void printApis(PrintStream out) {
        List<Pair<Integer, String>> apis = syncCopy(apiIdMap);
        apis.sort(COMPARATOR);
        List<String> apiList = toStringList(apis);
        printEntries(out, apiList);
    }
@author Jongho Moon
@author jaehong.kim
agent-module/profiler-test/src/main/java/com/navercorp/pinpoint/profiler/test/TestDataSender.java