 by creating <code><a href="Structs/StagedChangeset.html">StagedChangeset</a></code> from two collections of elements conforming to <code><a href="Protocols/Differentiable.html">Differentiable</a></code>:</p>
<pre class="highlight swift"><code><span class="k">let</span> <span class="nv">source</span> <span class="o">=</span> <span class="p">[</span>
    <span class="kt">User</span><span class="p">(</span><span class="nv">id</span><span class="p">:</span> <span class="mi">0</span><span class="p">,</span> <sp