SCM_CLASS_GDBM     19 ext/dbm/gdbm.c  #define SCM_GDBMP(obj)       SCM_XTYPEP(obj, SCM_CLASS_GDBM)
SCM_CLASS_GDBM    125 ext/dbm/gdbm.c   SCM_SET_CLASS(z, SCM_CLASS_GDBM);