oller-code-is-under-some-modal-code-uiviewcontroller-code' class='heading'>I want to push the <code>ProductViewController</code> into any <code>UINavigationController</code> that is present anywhere on the screen (even if the <code>UINavigationController</code> is under some modal <code>UIViewController</code>):</h4>
<pre class="highlight swift"><code>    <span class="k">let</span> <span class="nv">screen</span> <span class="o">=</span> <span class="kt">StepAssembly</span><span class="p">(</span>
          