+ /// \param theError the error string message if validation fails
+ virtual bool isValid(const std::shared_ptr<ModelAPI_Feature>& theFeature,
+ const std::list<std::string>& theArguments,
+ Events_InfoMessage& theError) const = 0;
+
+ /// Returns true if the attribute in feature is not obligatory for the feature execution
+ virtual bool isNotObligatory(std::string theFeature, std::string theAttribute) = 0;