FlexTable with static THEAD and TFOOT?

I am maintaining a pre-existing application that uses an MVC model with UIBinder and a FlexTable to display information. I am trying to update the display of the information into a single, properly formatted, semantically correct table. 

I basically have 3 elements that come into play and am looking for advice on how best to accomplish my goal. 

I have an "ElementPresenter" class (aka controller) and two ui.xml views (ElementView.ui.xml and ElementLineView.ui.xml) that render the final view. 

In my ElementPresenter class, I have a loadData() method that populates the two views.

private void loadData()
 FlexTable table = ElementView.getElementFlexTable();
 table.removeAllRows();
 int row = 0;

 for(DataLineProxy lineDTO :  data.getLines()){
   final ElementLineView lineView = new ElementLineView();
   //...populate some fields of lineView from lineDTO...
   table.setWidget(row++, 0, lineView);
 }

ElementView.ui.xml looks like this...

<g:HTMLPanel  ui:field="ElementView">
  <!--Arbitrary HTML-->
  <g:FlexTable ui:field="ElementFlexTable" />
  <!-- Other HTML that I would like to include inside the ElementFlexTable and is populated via the loadData() method -->
</g:HTMLPanel>

And ElementLineView.ui.xml looks like this...

<g:HorizontalPanel>
  <g:HTMLPanel>
    <!-- HTML that defines some divs and a table that contains the fields to display the data from lineDTO -->
  </g:HTMLPanel>
</g:HorizontalPanel>

This is what I'm trying to accomplish...I assume I would change ElementView.ui.xml to something like this

<g:HTMLPanel  ui:field="ElementView">
  <table>
    <thead>
      <tr>
        <th>Heading 1</th>
        <th>Heading 2</th>
      </tr>
    </thead>
    <tbody>
     <!-- some GWT widget that renders as a TR???? -->
    </tbody>
  </table>
</g:HTMLPanel>

If I'm understanding correctly, all I need is a "widget" or "panel" that I can add other "widgets" to, correct? I've looked into using TableSectionElement for my <tbody> where I could then add TableRowElements and TableCellElements to it. That seems ideal but UIBinder is not compatible with TableSectionElement. 

Has anyone solved a problem like this? I keep searching for "gwt flextable static heading" but I keep seeing results of how to lock a table header in a scrolling view which is not what I am after here.

I find it difficult to believe that GWT does not provide a framework for including static content (e.g. headings? footers?) in a dynamically generated table. Most frameworks allow for this so I'm hopeful that I am just missing something. Someone please tell me that I'm missing something? It seems like I should be able to do something like this...

<g:FlexTable ui:field="foo">

<g:FlexTableHead>

<g:FlexTableRow>

<g:FlexTableCell>some content</g:FlexTableCell>

<g:FlexTableRow>

</g:FlexTable>

Do I need to use a Grid or CellTable, perhaps?

Please help :(

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