ion</h4>
                        <div class="language">
                          <p class="aside-title">Swift</p>
                          <pre class="highlight swift"><code><span class="kd">public</span> <span class="kd">func</span> <span class="nf">assertNoFailure</span><span class="p">()</span> <span class="o">-&gt;</span> <span class="kt">SubscriberType</span><span class="o">&lt;</span><span class="kt">Element</span><span class="p">,</span> <span class="kt">Never</span><span class="o">&gt;</span></cod