selectionModel = new MultiSelectionModel<AssetPageRow>(providesKey);
cellTable.setSelectionModel(selectionModel);
SelectionColumn.createAndAddSelectionColumn(cellTable);
ColumnPicker<AssetPageRow> columnPicker = new ColumnPicker<AssetPageRow>(cellTable);
SortableHeaderGroup sortableHeaderGroup = new SortableHeaderGroup<AssetPageRow>(cellTable);
final TextColumn<AssetPageRow> uuidNumberColumn = new TextColumn<AssetPageRow>() {
public String getValue(AssetPageRow row) {
return row.getUuid();
}