Synopsis

                    EvMapping;
EvMapping *         ev_mapping_list_find                (EvMappingList *mapping_list,
                                                         gconstpointer data);
EvMapping *         ev_mapping_list_find_custom         (EvMappingList *mapping_list,
                                                         gconstpointer data,
                                                         GCompareFunc func);
gpointer            ev_mapping_list_get_data            (EvMappingList *mapping_list,
                                                         gdouble x,
                                                         gdouble y);