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

abstract class A extends core::Object {
  synthetic constructor •() → self::A
    ;
}
class B extends core::Object {
  final field self::A a;
  external constructor •(self::A a) → self::B;
}
class C extends core::Object {
  final field self::A a1;
  final field self::A a2;
  external constructor •() → self::C;
  constructor named(self::A a1, self::A a2) → self::C
    ;
}
class D extends core::Object {
  final field self::A a1;
  final field self::A a2;
  external constructor •() → self::D;
  constructor named(self::A a1) → self::D
    ;
}
class E extends core::Object {
  final field self::A a1;
  final field self::A a2;
  constructor •(self::A a2) → self::E
    ;
  external constructor named() → self::E;
}
class F extends core::Object {
  final field self::A a1;
  final field self::A a2;
  constructor •(self::A a1, self::A a2) → self::F
    ;
  external constructor named() → self::F;
}