FeaturePtr firstFeature();
/// Returns to the last (from the history point of view) feature, any: invisible or disabled
FeaturePtr lastFeature();
+ /// Returns true if theLater is in history of features creation later than theCurrent
+ bool isLater(FeaturePtr theLater, FeaturePtr theCurrent) const;
/// Returns the result group identifier of the given feature (for this at least one result must
/// be created before)