fferent performance behavior.</p>
<p>The following code illustrates that some List implementations support
only a subset of the API.</p>
<pre class="language-dart"><code>List&lt;int&gt; fixedLengthList = new List(5);
fixedLengthList.length = 0;  // Error
fixedLengthList.add(499);    // Error
fixedLengthList[0] = 87;
List&lt;int&gt; growableList = [1, 2];
growableList.length = 0;
growableList.add(499);
growableList[0] = 87;
</code></pre>
<p>Lists are <a href="dart-core/Iterable-class.html">Iterable</a>. Iter