library /*isNonNullableByDefault*/;
//
// Problems in library:
//
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:41:7: Error: The non-abstract class 'ConcreteSub' is missing implementations for these members:
//  - Interface1.extendedAbstractCovariantImplementedField
//  - Interface1.extendedAbstractImplementedCovariantField
//  - Interface1.implementsMultipleCovariantField1
//  - Interface1.implementsMultipleCovariantField2
//  - Interface2.implementsMultipleCovariantField1
//  - Interface2.implementsMultipleCovariantField2
//  - Super.extendedAbstractCovariantField
//  - Super.extendedAbstractCovariantField=
//  - Super.extendedAbstractCovariantImplementedField
//  - Super.extendedAbstractCovariantImplementedField=
//  - Super.extendedAbstractImplementedCovariantField
//  - Super.extendedAbstractImplementedCovariantField=
// Try to either
//  - provide an implementation,
//  - inherit an implementation from a superclass or mixin,
//  - mark the class as abstract, or
//  - provide a 'noSuchMethod' implementation.
//
// class ConcreteSub extends AbstractClass {}
//       ^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:22:7: Context: 'Interface1.extendedAbstractCovariantImplementedField' is defined here.
//   int extendedAbstractCovariantImplementedField = 0;
//       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:26:17: Context: 'Interface1.extendedAbstractImplementedCovariantField' is defined here.
//   covariant int extendedAbstractImplementedCovariantField = 0;
//                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:28:17: Context: 'Interface1.implementsMultipleCovariantField1' is defined here.
//   covariant int implementsMultipleCovariantField1 = 0;
//                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:30:7: Context: 'Interface1.implementsMultipleCovariantField2' is defined here.
//   int implementsMultipleCovariantField2 = 0;
//       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:34:7: Context: 'Interface2.implementsMultipleCovariantField1' is defined here.
//   int implementsMultipleCovariantField1 = 0;
//       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:36:17: Context: 'Interface2.implementsMultipleCovariantField2' is defined here.
//   covariant int implementsMultipleCovariantField2 = 0;
//                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:8:26: Context: 'Super.extendedAbstractCovariantField' is defined here.
//   abstract covariant int extendedAbstractCovariantField;
//                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:8:26: Context: 'Super.extendedAbstractCovariantField=' is defined here.
//   abstract covariant int extendedAbstractCovariantField;
//                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:12:26: Context: 'Super.extendedAbstractCovariantImplementedField' is defined here.
//   abstract covariant int extendedAbstractCovariantImplementedField;
//                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:12:26: Context: 'Super.extendedAbstractCovariantImplementedField=' is defined here.
//   abstract covariant int extendedAbstractCovariantImplementedField;
//                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:16:16: Context: 'Super.extendedAbstractImplementedCovariantField' is defined here.
//   abstract int extendedAbstractImplementedCovariantField;
//                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:16:16: Context: 'Super.extendedAbstractImplementedCovariantField=' is defined here.
//   abstract int extendedAbstractImplementedCovariantField;
//                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
//
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:43:7: Error: The non-abstract class 'ConcreteClass' is missing implementations for these members:
//  - Interface1.extendedAbstractCovariantImplementedField
//  - Interface1.extendedAbstractImplementedCovariantField
//  - Interface1.implementsMultipleCovariantField1
//  - Interface1.implementsMultipleCovariantField2
//  - Interface2.implementsMultipleCovariantField1
//  - Interface2.implementsMultipleCovariantField2
//  - Super.extendedAbstractCovariantField
//  - Super.extendedAbstractCovariantField=
//  - Super.extendedAbstractCovariantImplementedField
//  - Super.extendedAbstractCovariantImplementedField=
//  - Super.extendedAbstractImplementedCovariantField
//  - Super.extendedAbstractImplementedCovariantField=
// Try to either
//  - provide an implementation,
//  - inherit an implementation from a superclass or mixin,
//  - mark the class as abstract, or
//  - provide a 'noSuchMethod' implementation.
//
// class ConcreteClass extends Super implements Interface1, Interface2 {}
//       ^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:22:7: Context: 'Interface1.extendedAbstractCovariantImplementedField' is defined here.
//   int extendedAbstractCovariantImplementedField = 0;
//       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:26:17: Context: 'Interface1.extendedAbstractImplementedCovariantField' is defined here.
//   covariant int extendedAbstractImplementedCovariantField = 0;
//                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:28:17: Context: 'Interface1.implementsMultipleCovariantField1' is defined here.
//   covariant int implementsMultipleCovariantField1 = 0;
//                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:30:7: Context: 'Interface1.implementsMultipleCovariantField2' is defined here.
//   int implementsMultipleCovariantField2 = 0;
//       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:34:7: Context: 'Interface2.implementsMultipleCovariantField1' is defined here.
//   int implementsMultipleCovariantField1 = 0;
//       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:36:17: Context: 'Interface2.implementsMultipleCovariantField2' is defined here.
//   covariant int implementsMultipleCovariantField2 = 0;
//                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:8:26: Context: 'Super.extendedAbstractCovariantField' is defined here.
//   abstract covariant int extendedAbstractCovariantField;
//                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:8:26: Context: 'Super.extendedAbstractCovariantField=' is defined here.
//   abstract covariant int extendedAbstractCovariantField;
//                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:12:26: Context: 'Super.extendedAbstractCovariantImplementedField' is defined here.
//   abstract covariant int extendedAbstractCovariantImplementedField;
//                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:12:26: Context: 'Super.extendedAbstractCovariantImplementedField=' is defined here.
//   abstract covariant int extendedAbstractCovariantImplementedField;
//                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:16:16: Context: 'Super.extendedAbstractImplementedCovariantField' is defined here.
//   abstract int extendedAbstractImplementedCovariantField;
//                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/forwarding_stubs_field.dart:16:16: Context: 'Super.extendedAbstractImplementedCovariantField=' is defined here.
//   abstract int extendedAbstractImplementedCovariantField;
//                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
//
import self as self;
import "dart:core" as core;

abstract class Super extends core::Object {
  covariant-by-declaration field core::int extendedConcreteCovariantField = 0;
  covariant-by-declaration field core::int extendedConcreteCovariantImplementedField = 0;
  field core::int extendedConcreteImplementedCovariantField = 0;
  synthetic constructor •() → self::Super
    : super core::Object::•()
    ;
  abstract get extendedAbstractCovariantField() → core::int;
  abstract set extendedAbstractCovariantField(covariant-by-declaration core::int #externalFieldValue) → void;
  abstract get extendedAbstractCovariantImplementedField() → core::int;
  abstract set extendedAbstractCovariantImplementedField(covariant-by-declaration core::int #externalFieldValue) → void;
  abstract get extendedAbstractImplementedCovariantField() → core::int;
  abstract set extendedAbstractImplementedCovariantField(core::int #externalFieldValue) → void;
}
class Interface1 extends core::Object {
  field core::int extendedConcreteCovariantImplementedField = 0;
  field core::int extendedAbstractCovariantImplementedField = 0;
  covariant-by-declaration field core::int extendedConcreteImplementedCovariantField = 0;
  covariant-by-declaration field core::int extendedAbstractImplementedCovariantField = 0;
  covariant-by-declaration field core::int implementsMultipleCovariantField1 = 0;
  field core::int implementsMultipleCovariantField2 = 0;
  synthetic constructor •() → self::Interface1
    : super core::Object::•()
    ;
}
class Interface2 extends core::Object {
  field core::int implementsMultipleCovariantField1 = 0;
  covariant-by-declaration field core::int implementsMultipleCovariantField2 = 0;
  synthetic constructor •() → self::Interface2
    : super core::Object::•()
    ;
}
abstract class AbstractClass extends self::Super implements self::Interface1, self::Interface2 {
  synthetic constructor •() → self::AbstractClass
    : super self::Super::•()
    ;
  forwarding-stub set extendedConcreteImplementedCovariantField(covariant-by-declaration core::int value) → void
    return super.{self::Super::extendedConcreteImplementedCovariantField} = value;
  abstract forwarding-stub set extendedAbstractImplementedCovariantField(covariant-by-declaration core::int #externalFieldValue) → void;
  abstract forwarding-stub set implementsMultipleCovariantField2(covariant-by-declaration core::int value) → void;
}
class ConcreteSub extends self::AbstractClass {
  synthetic constructor •() → self::ConcreteSub
    : super self::AbstractClass::•()
    ;
}
class ConcreteClass extends self::Super implements self::Interface1, self::Interface2 {
  synthetic constructor •() → self::ConcreteClass
    : super self::Super::•()
    ;
  forwarding-stub set extendedConcreteImplementedCovariantField(covariant-by-declaration core::int value) → void
    return super.{self::Super::extendedConcreteImplementedCovariantField} = value;
  abstract forwarding-stub set extendedAbstractImplementedCovariantField(covariant-by-declaration core::int #externalFieldValue) → void;
  abstract forwarding-stub set implementsMultipleCovariantField2(covariant-by-declaration core::int value) → void;
}
static method main() → dynamic {}