public virtual void NavigationDrawerStatusBar(NavigationDrawerController navigationDrawerController, bool statusBar)
 {
 }
 public virtual void NavigationDrawerDidClose(NavigationDrawerController navigationDrawerController, NavigationDrawerPosition position)
 {
 }
 public virtual void NavigationDrawerDidTapPanAt(NavigationDrawerController navigationDrawerController, CGPoint point, NavigationDrawerPosition position)
 {
 }
 public virtual void NavigationDrawerWillOpen(NavigationDrawerController navigationDrawerController, NavigationDrawerPosition position)
 {
 }