an class="k">default</span><span class="o">.</span><span class="nf">addObserver</span><span class="p">(</span><span class="k">self</span><span class="p">,</span> <span class="nv">selector</span><span class="p">:</span> <span class="kd">#selector(</span><span class="nf">changedTheme(_:)</span><span class="kd">)</span><span class="p">,</span> <span class="nv">name</span><span class="p">:</span> <span class="o">.</span><span class="n">didChangeTheme</span><span class="p">,</span> <span class="nv">object</span>