public static <T extends HistogramDataPoint> Map<String, T> generateHistogramSkeleton(HistogramBean<T> rval, DateTime from, DateTime to,
            HistogramIntervalType interval, Class<T> dataType) {
        return generateHistogramSkeleton(rval, from, to, interval, dataType, String.class);
    }
Shortcut for the label (string) based histogram index.
@param rval the histogram bean
@param from the start date
@param to the end date
@param interval the histogram interval
@param dataType the data type class
manager/api/core/src/main/java/io/apiman/manager/api/core/metrics/MetricsAccessorHelper.java