tle">Author</p>
    <p>Craig Tweedy</p>

</div>

                      </div>
                      <div class="declaration">
                        <h4>Declaration</h4>
                        <div class="language">
                          <p class="aside-title">Swift</p>
                          <pre class="highlight swift"><code><span class="kd">@discardableResult</span>
<span class="kd">public</span> <span class="kd">func</span> <span class="nf">addProduct</span><span class="p">(</span><span class="