How to use the tartube.refresh.RefreshManager function in tartube

def __init__(self, app_obj, init_obj=None):

        if DEBUG_FUNC_FLAG:
            utils.debug_time('rop 73 __init__')

        super(RefreshManager, self).__init__()

        # IV list - class objects
        # -----------------------
        # The mainapp.TartubeApp object
        self.app_obj = app_obj
        # The media data object (channel, playlist or folder) to refresh, or
        #   None if the whole media data registry is to be refreshed
        self.init_obj = init_obj


        # IV list - other
        # ---------------
        # Flag set to False if self.stop_refresh_operation() is called, which
        #   halts the operation immediately
        self.running_flag = True