Function OwnedRef

python/pyarrow/src/arrow/python/common.h:185–185

 public:
  OwnedRef() : obj_(NULLPTR) {}
  OwnedRef(OwnedRef&& other) : OwnedRef(other.detach()) {}
  explicit OwnedRef(PyObject* obj) : obj_(obj) {}

  OwnedRef& operator=(OwnedRef&& other) {