+ bool changeConstraint(std::shared_ptr<SketchPlugin_Constraint> theConstraint);
+ /** \brief Adds or updates a rigid constraint in the group
+ * \param[in] theConstraint constraint to be changed
+ * \return \c true if the constraint added or updated successfully
+ */
+ bool changeRigidConstraint(std::shared_ptr<SketchPlugin_Constraint> theConstraint);