public static void ClearTab(ActionBar bar, ActionBar.Tab tab, bool removeFragment)
 {
     var listener = ServiceProvider.AttachedValueProvider.GetValue<TabListener>(tab, ListenerKey, false);
     if (listener == null)
         return;
     BindingServiceProvider.BindingManager.ClearBindings(tab);
     if (removeFragment)
         listener.Clear(bar, tab);
     tab.ClearBindings(true, true);
 }