presto-main/src/main/java/io/prestosql/operator/aggregation/histogram/HistogramStateSerializer.java/HistogramStateSerializer/deserialize
class HistogramStateSerializer:    @Override
    public void deserialize(Block block, int index, HistogramState state)
    {
        state.deserialize((Block) serializedType.getObject(block, index), type, EXPECTED_SIZE_FOR_HASHING);
    }