fsdbm_has_key     703 ext/sdbm/init.c     rb_define_method(rb_cDBM, "include?", fsdbm_has_key, 1);
fsdbm_has_key     704 ext/sdbm/init.c     rb_define_method(rb_cDBM, "has_key?", fsdbm_has_key, 1);
fsdbm_has_key     705 ext/sdbm/init.c     rb_define_method(rb_cDBM, "member?", fsdbm_has_key, 1);
fsdbm_has_key     707 ext/sdbm/init.c     rb_define_method(rb_cDBM, "key?", fsdbm_has_key, 1);