title: Calling methods in Aurelia template
body: <p>I want generate row like this:</p>
  
  <pre><code>&lt;tr repeat.for="item of block.columns.items"&gt;
     &lt;td repeat.for="columnName of $parent.block.columns.displayed"&gt;
        ${$parent.block.columns.get(columnName).render(item)}
     &lt;/td&gt;&gt;
  &lt;/tr&gt;
  </code></pre>
  
  <p>I know that Aurelia support only simple code in template but create complex <code>component</code> or <code>compose</code> is not good idea.</p>
  
  <p>Anybody know elegant solution for this task?</p>