library test;
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::•()
    ;
}
class C extends core::Object {
  field self::A* a = null;
  synthetic constructor •() → self::C*
    : super core::Object::•()
    ;
  method f(core::Object* o) → void {
    if(o is self::A* || o is self::B*) {
      if(o is self::A*) {
        this.{self::C::a} = o{self::A*};
      }
    }
  }
}
static method main() → dynamic {}