panel wicket:extend confusion

[Ryan McKinley]

I have been using markup inheritance for page layout for a while  
without any issue.

I just tried to use it for a Panel and am running into some issues --  
I imagine it is user error, so i figured I would ask here before  
banging my head much longer.

I have two classes:


SimpleRow.java
public class SimpleRow extends Panel
{
  public SimpleRow(String id )
  {
    ...
   }
}

SimpleRow.html
<table>
<wicket:panel>

<tr valign="top">
 <td width="60">
   <img wicket:id="img" src="img/explore.gif" />
 </td>
 <td wicket:id="td" valign="top">
   <h2 wicket:id="title">Title</h2>
   <wicket:child/>
 </td>
</tr>

</wicket:panel>
</table>

- - - - - - - - - -

Then I want a subclass to fill in content for <wicket:child/>

ExportRow.java
public class ExportRow extends SimpleRow
{
  public ExportRow(String id)
  {
    super( id );

    add( new Label( "test", "hello" ) );
  }
}

ExportRow.html
<wicket:extend>
Here is some text <span wicket:id="test">xxx</span>
</wicket:extend>

- - - - - -  -

With this, I get an errror:
Unable to find component with id 'test' in [MarkupContainer [Component  
id = _extend8]] ...

If I do not try to add any components in the subclass, things behave  
as I would expect.

Am I missing something?

Thanks
ryan