var nclassdef = parse_classdef(mod_string).as(AStdClassdef)
var nsuperclasses = nclassdef.n_propdefs
if nsuperclasses.length != 1 then
var nclassdef = parse_classdef(mod_string).as(AStdClassdef)
var nsuperclasses = nclassdef.n_propdefs
if nsuperclasses.length != 1 then