(self, id_list_arr)
guest -> host
        :param id_list_arr:
        :return:
guest -> host
        :param id_list_arr:
        :return:
guest - > host : param id_list_arr : : return :
def _sync_natural_index(self, id_list_arr):
        """
        guest -> host
        :param id_list_arr:
        :return:
        """
def _sync_natural_index ( self , id_list_arr ) :