</span><span class="p">:</span> <span class="kt">URL</span><span class="p">,</span>
                        <span class="nv">cacheKey</span><span class="p">:</span> <span class="kt">String</span><span class="p">?</span> <span class="o">=</span> <span class="kc">nil</span><span class="p">,</span>
                        <span class="nv">placeholderImage</span><span class="p">:</span> <span class="kt">UIImage</span><span class="p">?</span> <span class="o">=</span> <span class="kc">nil</span><span class="p">,<