=</span> <span class="kc">nil</span><span class="p">,</span> <span class="nv">onSubscribe</span><span class="p">:</span> <span class="p">(()</span> <span class="o">-&gt;</span> <span class="kt">Void</span><span class="p">)?</span> <span class="o">=</span> <span class="kc">nil</span><span class="p">,</span> <span class="nv">onSubscribed</span><span class="p">:</span> <span class="p">(()</span> <span class="o">-&gt;</span> <span class="kt">Void</span><span class="p">)?</span> <span class="o">=</span> <span cl