private Range toRange(RangeForm rangeForm) {
        Range between = Range.between(rangeForm.getFrom(), rangeForm.getTo());
        this.rangeValidator.validate(between);
        return between;
    }
@author emeroad
@author netspider
@author jaehong.kim
@author HyunGil Jeong
web/src/main/java/com/navercorp/pinpoint/web/applicationmap/controller/MapHistogramController.java