fgdbm_has_key    1274 ext/gdbm/gdbm.c     rb_define_method(rb_cGDBM, "include?", fgdbm_has_key, 1);
fgdbm_has_key    1275 ext/gdbm/gdbm.c     rb_define_method(rb_cGDBM, "has_key?", fgdbm_has_key, 1);
fgdbm_has_key    1276 ext/gdbm/gdbm.c     rb_define_method(rb_cGDBM, "member?", fgdbm_has_key, 1);
fgdbm_has_key    1278 ext/gdbm/gdbm.c     rb_define_method(rb_cGDBM, "key?", fgdbm_has_key, 1);