title: Override Object.toString Error
body: <p>Why does this produce an error in Flash Builder?:</p>
  
  <pre class="lang-flex prettyprint-override"><code>package {
    public class Foo {
      override public function toString():String {
        return "Foo";
      }
    }
  }
  </code></pre>
  
  <p>Tab completion suggests that this is available for override...</p>
  
  <p><strong>Error message:</strong></p>
  
  <pre><code>Multiple markers at this line:
  -public
  -1020: Method marked override must override another method.
  -overridesObject.toString
  </code></pre>