span>
</code></pre>

<p>In the case of sectioned collection, the section itself must have a unique identifier and be able to compare whether there is an update.<br>
So each section must conforming to <code><a href="Protocols/DifferentiableSection.html">DifferentiableSection</a></code> protocol, but in most cases you can use <code><a href="Structs/ArraySection.html">ArraySection</a></code> that general type conforming to it.<br>
<code><a href="Structs/ArraySection.html">ArraySection</a></code> requires a mod