fgdbm_has_key    1220 ext/gdbm/gdbm.c     rb_define_method(rb_cGDBM, "include?", fgdbm_has_key, 1);
fgdbm_has_key    1221 ext/gdbm/gdbm.c     rb_define_method(rb_cGDBM, "has_key?", fgdbm_has_key, 1);
fgdbm_has_key    1222 ext/gdbm/gdbm.c     rb_define_method(rb_cGDBM, "member?", fgdbm_has_key, 1);
fgdbm_has_key    1224 ext/gdbm/gdbm.c     rb_define_method(rb_cGDBM, "key?", fgdbm_has_key, 1);