library /*isNonNullableByDefault*/;
//
// Problems in library:
//
// pkg/front_end/testcases/nnbd_mixed/hierarchy/extend_multiple_field.dart:37:7: Error: The non-abstract class 'ConcreteSub' is missing implementations for these members:
//  - Interface1.extendedAbstractImplementedField
//  - Interface1.extendedAbstractImplementedMultipleField
//  - Interface2.extendedAbstractImplementedMultipleField
//  - Super.extendedAbstractField
//  - Super.extendedAbstractField=
//  - Super.extendedAbstractImplementedField
//  - Super.extendedAbstractImplementedField=
//  - Super.extendedAbstractImplementedMultipleField
//  - Super.extendedAbstractImplementedMultipleField=
// 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/extend_multiple_field.dart:22:7: Context: 'Interface1.extendedAbstractImplementedField' is defined here.
//   int extendedAbstractImplementedField = 0;
//       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/extend_multiple_field.dart:26:7: Context: 'Interface1.extendedAbstractImplementedMultipleField' is defined here.
//   int extendedAbstractImplementedMultipleField = 0;
//       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/extend_multiple_field.dart:32:7: Context: 'Interface2.extendedAbstractImplementedMultipleField' is defined here.
//   int extendedAbstractImplementedMultipleField = 0;
//       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/extend_multiple_field.dart:8:16: Context: 'Super.extendedAbstractField' is defined here.
//   abstract int extendedAbstractField;
//                ^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/extend_multiple_field.dart:8:16: Context: 'Super.extendedAbstractField=' is defined here.
//   abstract int extendedAbstractField;
//                ^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/extend_multiple_field.dart:12:16: Context: 'Super.extendedAbstractImplementedField' is defined here.
//   abstract int extendedAbstractImplementedField;
//                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/extend_multiple_field.dart:12:16: Context: 'Super.extendedAbstractImplementedField=' is defined here.
//   abstract int extendedAbstractImplementedField;
//                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/extend_multiple_field.dart:16:16: Context: 'Super.extendedAbstractImplementedMultipleField' is defined here.
//   abstract int extendedAbstractImplementedMultipleField;
//                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/extend_multiple_field.dart:16:16: Context: 'Super.extendedAbstractImplementedMultipleField=' is defined here.
//   abstract int extendedAbstractImplementedMultipleField;
//                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
//
// pkg/front_end/testcases/nnbd_mixed/hierarchy/extend_multiple_field.dart:39:7: Error: The non-abstract class 'ConcreteClass' is missing implementations for these members:
//  - Interface1.extendedAbstractImplementedField
//  - Interface1.extendedAbstractImplementedMultipleField
//  - Interface2.extendedAbstractImplementedMultipleField
//  - Super.extendedAbstractField
//  - Super.extendedAbstractField=
//  - Super.extendedAbstractImplementedField
//  - Super.extendedAbstractImplementedField=
//  - Super.extendedAbstractImplementedMultipleField
//  - Super.extendedAbstractImplementedMultipleField=
// 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/extend_multiple_field.dart:22:7: Context: 'Interface1.extendedAbstractImplementedField' is defined here.
//   int extendedAbstractImplementedField = 0;
//       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/extend_multiple_field.dart:26:7: Context: 'Interface1.extendedAbstractImplementedMultipleField' is defined here.
//   int extendedAbstractImplementedMultipleField = 0;
//       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/extend_multiple_field.dart:32:7: Context: 'Interface2.extendedAbstractImplementedMultipleField' is defined here.
//   int extendedAbstractImplementedMultipleField = 0;
//       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/extend_multiple_field.dart:8:16: Context: 'Super.extendedAbstractField' is defined here.
//   abstract int extendedAbstractField;
//                ^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/extend_multiple_field.dart:8:16: Context: 'Super.extendedAbstractField=' is defined here.
//   abstract int extendedAbstractField;
//                ^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/extend_multiple_field.dart:12:16: Context: 'Super.extendedAbstractImplementedField' is defined here.
//   abstract int extendedAbstractImplementedField;
//                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/extend_multiple_field.dart:12:16: Context: 'Super.extendedAbstractImplementedField=' is defined here.
//   abstract int extendedAbstractImplementedField;
//                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/extend_multiple_field.dart:16:16: Context: 'Super.extendedAbstractImplementedMultipleField' is defined here.
//   abstract int extendedAbstractImplementedMultipleField;
//                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// pkg/front_end/testcases/nnbd_mixed/hierarchy/extend_multiple_field.dart:16:16: Context: 'Super.extendedAbstractImplementedMultipleField=' is defined here.
//   abstract int extendedAbstractImplementedMultipleField;
//                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
//
import self as self;
import "dart:core" as core;

abstract class Super extends core::Object {
  field core::int extendedConcreteField = 0;
  field core::int extendedConcreteImplementedField = 0;
  field core::int extendedConcreteImplementedMultipleField = 0;
  synthetic constructor •() → self::Super
    : super core::Object::•()
    ;
  abstract get extendedAbstractField() → core::int;
  abstract set extendedAbstractField(core::int #externalFieldValue) → void;
  abstract get extendedAbstractImplementedField() → core::int;
  abstract set extendedAbstractImplementedField(core::int #externalFieldValue) → void;
  abstract get extendedAbstractImplementedMultipleField() → core::int;
  abstract set extendedAbstractImplementedMultipleField(core::int #externalFieldValue) → void;
}
class Interface1 extends core::Object {
  field core::int extendedConcreteImplementedField = 0;
  field core::int extendedAbstractImplementedField = 0;
  field core::int extendedConcreteImplementedMultipleField = 0;
  field core::int extendedAbstractImplementedMultipleField = 0;
  synthetic constructor •() → self::Interface1
    : super core::Object::•()
    ;
}
class Interface2 extends core::Object {
  field core::int extendedConcreteImplementedMultipleField = 0;
  field core::int extendedAbstractImplementedMultipleField = 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::•()
    ;
}
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::•()
    ;
}
static method main() → dynamic {}