How to hide private class declaration on doxygen documentation

Question

class class1:
public:
...
private:
class impl; //the class that i wanna hide
std::unique_ptr<impl> impl_;

//my doxygen file:

EXTRACT_ALL = YES

EXTRACT_PRIVATE = NO

EXTRACT_PACKAGE = NO

EXTRACT_STATIC = NO

EXTRACT_LOCAL_CLASSES = YES

EXTRACT_LOCAL_METHODS = NO

HIDE_UNDOC_MEMBERS = YES

HIDE_UNDOC_CLASSES = NO

Answer 1

Changing my doxygen file made it work!

EXTRACT_LOCAL_CLASSES  = NO