#ifndef _BRepToIGES_BREntity_HeaderFile #include #endif #ifndef _IGESData_IGESEntity_HeaderFile #include #endif #ifndef _TopoDS_Shape_HeaderFile #include #endif #ifndef _TopoDS_Shell_HeaderFile #include #endif #ifndef _TopoDS_Face_HeaderFile #include #endif #ifndef _BRepToIGES_BRShell_HeaderFile #include #endif