ine</code> publishers</li>
<li>Observation of traits changes, device rotation, language/locale, dark mode, dynamic fonts, background/foreground state</li>
<li>Any side-effect, I/O, networking, sensors, third-party libraries that you want to abstract</li>
</ul>
<pre class="highlight swift"><code>                  <span class="err">┌─────┐</span>                                                                                        <span class="err">┌─────┐</span>
                 