def METHOD_NAME(self, evt=None):
    """
    This method is called by the base class when it needs to popup
    the menu for the default EVT_RIGHT_DOWN event.  Just create
    the menu how you want it and return it from this function,
    the base class takes care of the rest.
    """
    menu = wx.Menu()
    menu.Append(self.TBMENU_CLUSTERUI, 'ClusterUI')
    return menu