/// Returns true if feature and/or attributes are valid
/// \param theFeature the validated feature
/// \param theArguments list of string, feature attribute names: dependent attributes
+ /// \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,
- std::string& theError = std::string()) const = 0;
+ std::string& 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;