callbackResults.putAll(callback.getStatData());
callbackResults.putAll(callbackData);
    public List<Object> getData() {        List<Object> data = new ArrayList<Object>();                // Collect stats from all callbacks        Map<String, Object> callbackResults = new HashMap<String, Object>();        for (RealtimeStatsCallback callback : mCallbacks) {            Map<String, Object> callbackData = callback.getStatData();            if (callbackData != null) {                callbackResults.putAll(callback.getStatData());            }        }                // Populate data based on callback results        for (String name : mNames) {            data.add(callbackResults.remove(name));        }        if (callbackResults.size() > 0) {            ZimbraLog.perf.warn("Detected unexpected realtime stats: " +                StringUtil.join(", ", callbackResults.keySet()));                    }        return data;    }