
By adding an optional CRTP template parameter, the BaseReaderHandler can call the "overridden" `Default()` function from the `Derived` class. See https://en.wikipedia.org/wiki/Curiously_recurring_template_pattern
By adding an optional CRTP template parameter, the BaseReaderHandler can call the "overridden" `Default()` function from the `Derived` class. See https://en.wikipedia.org/wiki/Curiously_recurring_template_pattern