library;
import self as self;
import "dart:core" as core;

class A extends core::Object {
  synthetic constructor •() → self::A
    ;
}
class B extends self::A {
  synthetic constructor •() → self::B
    ;
}
class C extends core::Object {
  synthetic constructor •() → self::C
    ;
  set x(self::A value) → void
    ;
  get y() → self::B
    ;
}
class D extends self::C {
  synthetic constructor •() → self::D
    ;
  set x(dynamic value) → void
    ;
  get y() → dynamic
    ;
}
class E extends self::D {
  synthetic constructor •() → self::E
    ;
  set x(self::A value) → void
    ;
  get y() → self::B
    ;
}
class F extends self::D {
  synthetic constructor •() → self::F
    ;
  set x(self::B value) → void
    ;
  get y() → self::A
    ;
}
static method main() → dynamic
  ;