presto-main/src/main/java/io/prestosql/operator/aggregation/histogram/GroupedHistogramState.java/GroupedHistogramState/deserialize
class GroupedHistogramState:    @Override
    public void deserialize(Block block, Type type, int expectedSize)
    {
        typedHistogram = new GroupedTypedHistogram(getGroupId(), block, type, expectedSize);
    }