@Override
        public void entity2Storage(final HistogramFunction storageData, final Convert2Storage converter) {
            converter.accept(DATASET, storageData.getDataset());
            converter.accept(TIME_BUCKET, storageData.getTimeBucket());
            converter.accept(ENTITY_ID, storageData.getEntityId());
        }
Histogram includes data range buckets and the amount matched/grouped in the buckets. This is for original histogram
graph visualization
oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/function/HistogramFunction.java