g a new element to the set.</p>
<p>Modifying the underlying collection after creating the new iterator
may cause an error the next time <a href="dart-core/Iterator/moveNext.html">Iterator.moveNext</a> is called
on that iterator.
Any <em>modifiable</em> iterable class should specify which operations will
break iteration.</p>
</section>
<section class="summary source-code" id="source">
  <h2><span>Implementation</span> </h2>
  <pre class="language-dart"><code class="language-dart">Iterator&lt;E&gt; get iterat