!7

sclass A {
  class InnerA {
    void check {
      print("Father: " + A.this);
      assertNotNull(A.this);
    }
  }
}

sclass B extends A {
  class InnerB extends InnerA {
  }
  
  *() { new InnerB; }
}

p-exp {
  new B().new InnerB().check();
}