id_for_attr      1962 object.c       	rb_attr(klass, id_for_attr(klass, argv[i]), TRUE, FALSE, TRUE);
id_for_attr      1972 object.c       	rb_attr(klass, id_for_attr(klass, argv[0]), 1, RTEST(argv[1]), TRUE);
id_for_attr      1994 object.c       	rb_attr(klass, id_for_attr(klass, argv[i]), FALSE, TRUE, TRUE);
id_for_attr      2022 object.c       	rb_attr(klass, id_for_attr(klass, argv[i]), TRUE, TRUE, TRUE);