title: it should remove the item in list number 3?
body: <p>I want to know how this work it should remove the item in list number 3 which is 'four' and print 'one','two','Three' why it is print three, four</p>
  <p>here is the code:</p>
  <pre class="lang-dart prettyprint-override"><code>final numbers = &lt;String&gt;['one', 'two', 'three', 'four'];
  numbers.removeWhere((item) =&gt; item.length == 3);
  print(numbers); // [three, four]`
  </code></pre>