of <code>self</code> that satisfy <code>isIncluded</code>.</p>

<p><strong>Note:</strong> The elements of the result are computed on-demand, as
  the result is used. No buffering storage is allocated and each
  traversal step invokes <code>predicate</code> on one or more underlying
  elements.</p>

    <h4>Declaration</h4>    
    <code class="language-swift">func filter(_ isIncluded: @escaping (LazyFilterSequence&lt;Base&gt;.Elements.Iterator.Element) -&gt; Bool) -&gt; LazyFilterSequence&lt;LazyFilterSeque