columns.add(new PropertyColumn<Task, String>(Model.of("TaskCreationTimestamp"), "taskCreationTimestamp",
"taskCreationTimestamp"));
FilterForm<Task> form = new FilterForm<Task>("form", dataProvider);
DefaultDataTable<Task, String> dataTable =
new DefaultDataTable<Task, String>("dataTable", columns, dataProvider, 15);
dataTable.addTopToolbar(new FilterToolbar(dataTable, form, dataProvider));
form.add(dataTable);
add(form);
add(panel);
}