def METHOD_NAME(self, args, upcall=True):
    if args.binexpr:
        westpa.rc.pstatus("Constructing rectilinear bin boundaries from the following expression: '{}'".format(args.binexpr))
        self.mapper = self.mapper_from_expr(args.binexpr)
    else:
        westpa.rc.pstatus('Loading bin boundaries from WEST system')
        system = westpa.rc.get_system_driver()
        self.mapper = system.bin_mapper
    self.n_bins = self.mapper.nbins
    _pdat, self.mapper_hash = self.mapper.pickle_and_hash()
    westpa.rc.pstatus('  {:d} bins'.format(self.n_bins))
    westpa.rc.pstatus('  identity hash {}'.format(self.mapper_hash))
    self.discard_bin_assignments = bool(args.discard_bin_assignments)
    if upcall:
        try:
            upfunc = super().METHOD_NAME
        except AttributeError:
            pass
        else:
            upfunc(args)