mrb_define_class_under(mrb_state *mrb, struct RClass *outer, const char *name, struct RClass *super)
{
  return mrb_define_class_under_id(mrb, outer, mrb_intern_cstr(mrb, name), super);
}
mrb_define_class_under(mrb_state *mrb, struct RClass *outer, const char *name, struct RClass *super)
{
  return mrb_define_class_under_id(mrb, outer, mrb_intern_cstr(mrb, name), super);
}