code: def show(self, ):
          
          wins = set(JB_MainWindow.instances())
          widgets = set(self.get_widgets())
          for w in wins - widgets:
              self.add_widget(w)
          super(JB_WindowToolTip, self).show()
docs: Reimplementation of show to update all currently available JB_MainWindows
  
          :returns: None
          :rtype: None
          :raises: None