Resources res = GWT.create(Resources.class);
CellTable<String> table = new CellTable<String>(10, res);
TextHeader header = new TextHeader("Hello");
// Get the style information.
Style style = res.cellTableStyle();
String styleHeader = style.cellTableHeader();
String styleFirstColumn = style.cellTableFirstColumnHeader();
String styleLastColumn = style.cellTableLastColumnHeader();
// No header.
table.redraw();
table.getPresenter().flush();
assertEquals(0, getHeaderCount(table));