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