How to use DataGrid?

I'd been trying to use the DataGrid but I am running into problems. Consider this code.

private static class MyWidget extends Composite {
   
    private SimpleLayoutPanel slp = new SimpleLayoutPanel ();
    private VerticalPanel vPanel = new VerticalPanel();
    private SimplePager pager = new SimplePager ();
    private DataGrid<Caption> table = new DataGrid<Foo> (5);
 
   
    ListDataProvider<Caption> dataProvider = new ListDataProvider<Foo>();

public    MyWidget (){
       
        initWidget (vPanel);
           
        dataProvider.addDataDisplay (table);
        dataProvider.setList (FOO);
       
      
       
        pager.setDisplay (table);
       
     
        slp.add (table);
            
        vPanel.add (slp);
        vPanel.add (pager);
               
 
        pager.setVisible (true);
        table.setVisible (true);
     
               
        table.setKeyboardSelectionPolicy (KeyboardSelectionPolicy.ENABLED);
       
        TextColumn<Foo> captionLine = new TextColumn<Foo>(){
        @Override
        public String getValue (Caption object){
            return object.line ;
           
        }
        };



       
        table.setRowCount(CAPTION.size(), true);
     
        table.setRowData(0, CAPTION);
        table.setWidth ("100%");
   
        }

When I run the code and test it, I do not see the DataGrid on the table just the pager. If I do something like

 slp.add(tablet);
  RootLayoutPanel.get().add(slp);
      RootLayoutPanel.get().add(pager);

I can see the contents on the table and the pager on top of DataGrid.

regards
anne

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