argf_getpartial  11190 io.c           static VALUE argf_getpartial(int argc, VALUE *argv, VALUE argf, VALUE opts,
argf_getpartial  11216 io.c               return argf_getpartial(argc, argv, argf, Qnil, 0);
argf_getpartial  11237 io.c               return argf_getpartial(argc, argv, argf, opts, 1);