">-&gt;</span> <span class="kt">Bool</span> <span class="p">{</span>
            <span class="k">return</span> <span class="n">viewController</span><span class="o">.</span><span class="n">presentingViewController</span> <span class="o">!=</span> <span class="kc">nil</span>
        <span class="p">}</span>

    <span class="p">}</span>

    <span class="k">let</span> <span class="nv">screen</span> <span class="o">=</span> <span class="kt">StepAssembly</span><span class="p">(</span>
        <span class="nv">f