Forlani&quot;]
employees.formSymmetricDifference(neighbors)
print(employees)
// Prints &quot;[&quot;Diana&quot;, &quot;Forlani&quot;, &quot;Alicia&quot;]&quot;
</code></pre>
<ul>
<li>Parameter other: A set of the same type.</li>
</ul>
<h4>Declaration</h4><code class="language-swift">mutating func formSymmetricDifference(_ other: Self)</code></div></div><div id="formUnion-9e412b159206685203d2312146d59c60" class="declaration"><a class="toggle-link" href="#comment-formUnion-9e412b159206685203d2312146d59c60">fu