presto-main/src/main/java/io/prestosql/operator/aggregation/state/QuantileDigestStateSerializer.java/QuantileDigestStateSerializer/deserialize
class QuantileDigestStateSerializer:    @Override
    public void deserialize(Block block, int index, QuantileDigestState state)
    {
        state.setQuantileDigest(new QuantileDigest(type.getSlice(block, index)));
    }