title: knockout, nested foreach
body: <p>Let's I have Humans with Cats with Kittens  </p>
  
  <pre><code>class Master
  {  
     String masterName;
  
     Cat[] cats;  
  }
  class Cat 
  {
     String catName;
  
     Kitten[] kittens;
  }
  
  class Kitten 
  {
     String kittenName;
  }  
  </code></pre>
  
  <p>Now I want show all my Kittens with Cats with Masters in html. I use  </p>
  
  <pre><code>                    &lt;!-- ko foreach: humans --&gt;
                      &lt;!-- ko foreach: cats --&gt;
                      &lt;!-- ko foreach: kittens --&gt;
  &lt;p data-bind="$data.kittenName"&gt;&lt;/p&gt;
  &lt;p data-bind="$parent.catName"&gt;&lt;/p&gt;
  &lt;p data-bind="???????"&gt;&lt;/p&gt;   &lt;!-- How get master's name? --&gt;
                      &lt;!-- /ko --&gt;
                      &lt;!-- /ko --&gt;
                      &lt;!-- /ko --&gt;
  </code></pre>