title: Twig variables in twig variable
body: <p>I have a twig variable <strong>html</strong>. To show it in a twig template I do <code>{{html}}</code>. </p>
  
  <p>That variable looks like:</p>
  
  <p><code>&lt;div&gt;{{region_top}}&lt;/div&gt;&lt;div&gt;{{region_center}}&lt;/div&gt;</code></p>
  
  <p><code>region_*</code> is a variable too. When Twig parses my <code>html</code> variable, it doesn't parse the inner variables (regions).</p>
  
  <p>What I should do?</p>