lementofresult">func flatMap&lt;ElementOfResult&gt;(<wbr>_: @escaping (LazyFilterSequence&lt;Base&gt;.Elements.Iterator.Element) -&gt; ElementOfResult?)</a>
        
<div class="comment collapse" id="comment-func-flatmap-elementofresult_-escaping-self-elements-iterator-element-elementofresult"><div class="p">
    <p>Returns the non-<code>nil</code> results of mapping the given transformation over
this sequence.</p>

<p>Use this method to receive a sequence of nonoptional values when your
transformation prod