rb_io_close_m    10684 io.c                   rb_io_close_m(stp->src);
rb_io_close_m    10687 io.c                   rb_io_close_m(stp->dst);
rb_io_close_m    12355 io.c               rb_define_method(rb_cIO, "close", rb_io_close_m, 0);