public static extern SUDrawingElementRef SUSectionPlaneToDrawingElement(SUSectionPlaneRef drawing_elem);
 public static extern SU_RESULT SUSectionPlaneCreate(ref SUSectionPlaneRef sectionPlane);
 public static extern SU_RESULT SUSectionPlaneSetSymbol(SUSectionPlaneRef sectionPlane, string symbol);
 public static extern SUEntityRef SUSectionPlaneToEntity(SUSectionPlaneRef drawing_elem);
 public static extern SU_RESULT SUSectionPlaneGetSymbol(SUSectionPlaneRef sectionPlane, ref SUStringRef symbol);
 public static extern SU_RESULT SUSectionPlaneSetName(SUSectionPlaneRef sectionPlane, string name);
 public static extern SU_RESULT SUSectionPlaneGetName(SUSectionPlaneRef sectionPlane, ref SUStringRef name);
 public static extern SU_RESULT SUSectionPlaneIsActive(SUSectionPlaneRef sectionPlane, ref bool is_active);
 public static extern SU_RESULT SUSectionPlaneGetPlane(SUSectionPlaneRef sectionPlane, ref SUPlane3D plane);