presto-main/src/main/java/io/prestosql/operator/aggregation/state/HyperLogLogStateFactory.java/GroupedHyperLogLogState/setHyperLogLog
class GroupedHyperLogLogState:        @Override
        public void setHyperLogLog(HyperLogLog value)
        {
            requireNonNull(value, "value is null");
            hlls.set(getGroupId(), value);
        }