| library; | 
 | import self as self; | 
 | import "dart:core" as core; | 
 |  | 
 | abstract class A extends core::Object { | 
 |   synthetic constructor •() → self::A | 
 |     : super core::Object::•() | 
 |     ; | 
 | } | 
 | abstract class B extends core::Object { | 
 |   synthetic constructor •() → self::B | 
 |     : super core::Object::•() | 
 |     ; | 
 |   abstract method foo(core::num x) → void; | 
 | } | 
 | abstract class C extends core::Object implements self::B { | 
 |   synthetic constructor •() → self::C | 
 |     : super core::Object::•() | 
 |     ; | 
 |   abstract method foo(covariant-by-declaration core::int x) → void; | 
 | } | 
 | abstract class D1 extends core::Object implements self::A, self::C, self::B { | 
 |   synthetic constructor •() → self::D1 | 
 |     : super core::Object::•() | 
 |     ; | 
 |   abstract method foo(covariant-by-declaration core::int x) → void; | 
 | } | 
 | class D2 extends core::Object implements self::A, self::C, self::B { | 
 |   synthetic constructor •() → self::D2 | 
 |     : super core::Object::•() | 
 |     ; | 
 |   method foo(covariant-by-declaration core::int x) → void {} | 
 | } | 
 | abstract class D3 extends core::Object implements self::A, self::C, self::B { | 
 |   synthetic constructor •() → self::D3 | 
 |     : super core::Object::•() | 
 |     ; | 
 |   abstract forwarding-stub method foo(covariant-by-declaration core::num x) → void; | 
 | } | 
 | abstract class D4 extends core::Object implements self::A, self::C, self::B { | 
 |   synthetic constructor •() → self::D4 | 
 |     : super core::Object::•() | 
 |     ; | 
 |   abstract method foo(covariant-by-declaration core::int x) → void; | 
 | } | 
 | abstract class D5 extends core::Object implements self::A, self::C, self::B { | 
 |   synthetic constructor •() → self::D5 | 
 |     : super core::Object::•() | 
 |     ; | 
 |   abstract method foo(covariant-by-declaration core::num x) → void; | 
 | } | 
 | abstract class E extends core::Object { | 
 |   synthetic constructor •() → self::E | 
 |     : super core::Object::•() | 
 |     ; | 
 |   abstract set foo(core::num x) → void; | 
 | } | 
 | abstract class G extends core::Object implements self::E { | 
 |   synthetic constructor •() → self::G | 
 |     : super core::Object::•() | 
 |     ; | 
 |   abstract set foo(covariant-by-declaration core::int x) → void; | 
 | } | 
 | abstract class H1 extends core::Object implements self::A, self::E, self::G { | 
 |   synthetic constructor •() → self::H1 | 
 |     : super core::Object::•() | 
 |     ; | 
 |   abstract set foo(covariant-by-declaration core::int x) → void; | 
 | } | 
 | class H2 extends core::Object implements self::A, self::E, self::G { | 
 |   synthetic constructor •() → self::H2 | 
 |     : super core::Object::•() | 
 |     ; | 
 |   set foo(covariant-by-declaration core::int x) → void {} | 
 | } | 
 | abstract class H3 extends core::Object implements self::A, self::E, self::G { | 
 |   synthetic constructor •() → self::H3 | 
 |     : super core::Object::•() | 
 |     ; | 
 |   abstract forwarding-stub set foo(covariant-by-declaration core::num x) → void; | 
 | } | 
 | abstract class H4 extends core::Object implements self::A, self::E, self::G { | 
 |   synthetic constructor •() → self::H4 | 
 |     : super core::Object::•() | 
 |     ; | 
 |   abstract set foo(covariant-by-declaration core::int x) → void; | 
 | } | 
 | abstract class H5 extends core::Object implements self::A, self::E, self::G { | 
 |   synthetic constructor •() → self::H5 | 
 |     : super core::Object::•() | 
 |     ; | 
 |   abstract set foo(covariant-by-declaration core::num x) → void; | 
 | } | 
 | static method main() → dynamic {} |