/// Construction result is allways recomuted on the fly
SKETCHPLUGIN_EXPORT virtual bool isPersistentResult() {return false;}
/// Returns true is sketch element is under the rigid constraint
SKETCHPLUGIN_EXPORT virtual bool isFixed() {return false;}
/// Construction result is allways recomuted on the fly
SKETCHPLUGIN_EXPORT virtual bool isPersistentResult() {return false;}
/// Returns true is sketch element is under the rigid constraint
SKETCHPLUGIN_EXPORT virtual bool isFixed() {return false;}