-@implementation RVPage
-
-- (NSString *) title {
- [self doesNotRecognizeSelector:_cmd];
- return nil;
-}
-
-- (NSString *) backButtonTitle {
- return nil;
-}
-
-- (NSString *) leftButtonTitle {
- return nil;
-}
-
-- (id) rightButtonTitle {
- return nil;
-}
-
-- (UINavigationButtonStyle) leftButtonStyle {
- return [self leftButtonTitle] == nil ? UINavigationButtonStyleBack : UINavigationButtonStyleNormal;
-}
-
-- (UINavigationButtonStyle) rightButtonStyle {
- return UINavigationButtonStyleNormal;
-}
-
-- (void) _rightButtonClicked {
- [self doesNotRecognizeSelector:_cmd];
-}
-
-- (void) _leftButtonClicked {
- [self doesNotRecognizeSelector:_cmd];
-}
-
-- (UIView *) accessoryView {
- return nil;