this.isStable = clasz.isPackageClass() || (clasz.isModuleClass() && vlink == null);
this.isStable = clasz.isPackageClass();
        public TypeContext(Symbol clasz, TypeContext[] outers, Symbol[] tlinks, Symbol vlink, Symbol[] oldtparams, Map tparams) {            this.clasz = clasz;            this.isStable = clasz.isPackageClass() || (clasz.isModuleClass() && vlink == null);            this.outers = outers;            this.tlinks = tlinks;            this.vlink = vlink;            this.oldtparams = oldtparams;            this.transformer = new TypeTransformer(this, tparams);        }