>key</span><span class="p">:</span> <span class="kt">CodingKey</span><span class="p">?</span> <span class="o">=</span> <span class="kc">nil</span><span class="p">)</span> <span class="k">throws</span> <span class="o">-&gt;</span> <span class="kt">D</span></code></pre>

                        </div>
                      </div>
                      <div>
                        <h4>Parameters</h4>
                        <table class="graybox">
                          <tbody>
                            