date_s__iso8601  4427 ext/date/date_core.c 	VALUE hash = date_s__iso8601(klass, str);
date_s__iso8601  7959 ext/date/date_core.c 	VALUE hash = date_s__iso8601(klass, str);
date_s__iso8601  9259 ext/date/date_core.c     rb_define_singleton_method(cDate, "_iso8601", date_s__iso8601, 1);