            <div class="pdoc-code codehilite"><pre><span></span><span id="L-1"><a href="#L-1"><span class="linenos"> 1</span></a><span class="sd">&quot;&quot;&quot; helper utilities &quot;&quot;&quot;</span>
</span><span id="L-2"><a href="#L-2"><span class="linenos"> 2</span></a>
</span><span id="L-3"><a href="#L-3"><span class="linenos"> 3</span></a>
</span><span id="L-4"><a href="#L-4"><span class="linenos"> 4</span></a><span class="kn">from</span><span class="w"> </span><span class="nn">typing</span><spa