 occur
in the given set.</p>
<p>In the following example, the <code>nonNeighbors</code> set is made up of the
elements of the <code>employees</code> set that are not elements of <code>neighbors</code>:</p>
<pre><code class="language-swift">let employees: Set = [&quot;Alicia&quot;, &quot;Bethany&quot;, &quot;Chris&quot;, &quot;Diana&quot;, &quot;Eric&quot;]
let neighbors: Set = [&quot;Bethany&quot;, &quot;Eric&quot;, &quot;Forlani&quot;, &quot;Greta&quot;]
let nonNeighbors = employees.subtracting(neighbors)
