presto-main/src/main/java/io/prestosql/operator/aggregation/histogram/GroupedTypedHistogram.java/GroupedTypedHistogram/BucketDataNode
class GroupedTypedHistogram:        private BucketDataNode(int bucketId, ValueNode valueNode, long valueHash, long valueAndGroupHash, int nodePointerToUse, boolean isEmpty)
        {
            this.bucketId = bucketId;
            this.valueNode = valueNode;
            this.valueHash = valueHash;
            this.valueAndGroupHash = valueAndGroupHash;
            this.nodePointerToUse = nodePointerToUse;
            this.isEmpty = isEmpty;
        }