var nclassdef = self.modelbuilder.mclassdef2nclassdef[cd]
for npropdef in nclassdef.n_propdefs do
if not npropdef isa AAttrPropdef then continue
var nclassdef = self.modelbuilder.mclassdef2nclassdef[cd]
for npropdef in nclassdef.n_propdefs do
if not npropdef isa AAttrPropdef then continue