<span class="parameter" id="singleWhere-param-orElse"><span class="type-annotation">E</span> <span class="parameter-name">orElse</span>()</span> })
      <div class="features">override</div>
    </section>
    <section class="desc markdown">
      <p>Returns the single element that satisfies <code>test</code>.</p>
<p>Checks elements to see if <code>test(element)</code> returns true.
If exactly one element satisfies <code>test</code>, that element is returned.
If more than one matching element is found, thro