library /*isNonNullableByDefault*/;
//
// Problems in library:
//
// pkg/front_end/testcases/nnbd_mixed/mixin_from_opt_in.dart:5:1: Error: A library can't opt out of non-nullable by default, when in nnbd-strong mode.
// // @dart=2.6
// ^^^^^^^^^^^^
//
import self as self;
import "dart:core" as core;
import "mixin_from_opt_in_lib.dart" as mix;

import "org-dartlang-testcase:///mixin_from_opt_in_lib.dart";

abstract class _Class&Object&Mixin = core::Object with mix::Mixin /*isAnonymousMixin,hasConstConstructor*/  {
  const synthetic constructor •() → self::_Class&Object&Mixin
    : super core::Object::•()
    ;
}
class Class extends self::_Class&Object&Mixin {
  synthetic constructor •() → self::Class
    ;
}
static method main() → dynamic
  ;

library /*isNonNullableByDefault*/;
import self as mix;
import "dart:core" as core;

class Mixin extends core::Object {
  synthetic constructor •() → mix::Mixin
    ;
  method method(core::int? i) → core::int
    ;
}