def METHOD_NAME(self, obj): # for Compatibility with older versions
    if not hasattr(obj, "Parameterization"):
        _tip = QT_TRANSLATE_NOOP("App::Property","Parameterization factor")
        obj.addProperty("App::PropertyFloat", "Parameterization", "Draft", _tip)
        obj.Parameterization = 1.0
        self.knotSeq = []