Method deserialize

bolt/exec/tests/ContainerRowSerdeTest.cpp:90–106

  }

  VectorPtr deserialize(
      HashStringAllocator::Position position,
      const TypePtr& type,
      vector_size_t numRows) {
    auto data = BaseVector::create(type, numRows, pool());
    // Set all rows in data to NULL to verify that deserialize can clear nulls
    // correctly.
    for (auto i = 0; i < numRows; ++i) {
      data->setNull(i, true);
    }

    auto in = HashStringAllocator::prepareRead(position.header);
    for (auto i = 0; i < numRows; ++i) {
      ContainerRowSerde::deserialize(*in, i, data.get());
    }
    return data;
  }

  void testRoundTrip(const VectorPtr& data) {
    auto position = serialize(data);