+ /*!
+ * \brief Double nodes on some external faces and create flat elements.
+ * Flat elements are mainly used by some types of mechanic calculations.
+ *
+ * Each group of the list must be constituted of faces.
+ * Triangles are transformed in prisms, and quadrangles in hexahedrons.
+ * \param theGroupsOfFaces - list of groups of faces
+ * \return TRUE if operation has been completed successfully, FALSE otherwise
+ */
+ boolean CreateFlatElementsOnFacesGroups( in ListOfGroups theGroupsOfFaces );