fsdbm_fetch       162 ext/sdbm/init.c     return fsdbm_fetch(obj, keystr, Qnil);
fsdbm_fetch       171 ext/sdbm/init.c     valstr = fsdbm_fetch(obj, keystr, ifnone);
fsdbm_fetch       237 ext/sdbm/init.c         rb_ary_push(new, fsdbm_fetch(obj, argv[i], Qnil));