In order to support following usage, when we extend a refcounting abstract class, but want the inherited class still being an abstract class. Therefore, we would like to have a marco to declare pure virtual override refcounting methods.

class foo {
 public:
  NS_INLINE_DECL_PURE_VIRTUAL_REFCOUNTING 
  virtual doSomething() = 0;
};

class bar : public foo {
 public:
  // We want to override AddRef() and Release() but still make this class as an abstract class
  virtual doSomething() override = 0;
  virtual doAnotherThing() = 0;
};

In order to support a usage where we want to extend a refcounting abstract class, but want the inherited class still being an abstract class. Therefore, we would like to have a marco to declare pure virtual override refcounting methods.