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

abstract class A extends core::Object {
  constructor •() → void
    : super core::Object::•()
    ;
}
abstract class B extends core::Object {
  constructor •() → void
    : super core::Object::•()
    ;
}
class AB1 extends self::A implements self::B {
  constructor •() → void
    : super self::A::•()
    ;
}
class AB2 extends self::A implements self::B {
  constructor •() → void
    : super self::A::•()
    ;
}
class BA1 extends self::B implements self::A {
  constructor •() → void
    : super self::B::•()
    ;
}
class BA2 extends self::B implements self::A {
  constructor •() → void
    : super self::B::•()
    ;
}
static method takeSubclassOfA(dynamic obj) → dynamic {}
static method takeSubclassOfB(dynamic obj) → dynamic {}
static method main() → dynamic {
  self::takeSubclassOfA(new self::AB1::•());
  self::takeSubclassOfA(new self::AB2::•());
  self::takeSubclassOfB(new self::BA1::•());
  self::takeSubclassOfB(new self::BA2::•());
}