Method Visit

python/pyarrow/src/arrow/python/arrow_to_pandas.cc:1150–1162

  PyObject** out_values;

  Status Visit(const NullType& type) {
    for (int c = 0; c < data.num_chunks(); c++) {
      std::shared_ptr<Array> arr = data.chunk(c);

      for (int64_t i = 0; i < arr->length(); ++i) {
        // All values are null
        Py_INCREF(Py_None);
        *out_values = Py_None;
        ++out_values;
      }
    }
    return Status::OK();
  }

  Status Visit(const BooleanType& type) {
    for (int c = 0; c < data.num_chunks(); c++) {