int mrb_const_defined_at(mrb_state *mrb, struct RClass *klass, mrb_sym id) { return mrb_const_defined_0(mrb, klass, id, TRUE, FALSE); }
MRB_API mrb_bool mrb_const_defined_at(mrb_state *mrb, mrb_value mod, mrb_sym id) { return mrb_const_defined_0(mrb, mod, id, TRUE, FALSE); }