private List<TimeHistogramViewModel> createResponseTimeViewModel(List<TimeHistogram> timeHistogramList, TimeHistogramFormat timeHistogramFormat) {
        TimeHistogramBuilder builder = new TimeHistogramBuilder(timeHistogramFormat);
        return builder.build(application, timeHistogramList);
    }
most of the features have been delegated to AgentHistogramList upon refactoring
TODO: functionality reduced to creating views - need to be renamed or removed

@author emeroad
web/src/main/java/com/navercorp/pinpoint/web/applicationmap/histogram/AgentTimeHistogram.java