dog.p6

class Tail
{
    method wag()
    {
        say "swish, swish, swish";
    }
}

class Dog is Animal
{
   has Str $.tag is rw;
   has Tail $!tail handles 'wag' = Tail.new();

   method bark()
   {
       say "woof, woof!";
   }
}