public void buttonClick(Button.ClickEvent event) {
withErrorHandling(getApplication(), new Runnable() {
@Override
public void run() {
EventHandler okHandler = new EventHandler() {
@Override
public void onEvent() {
ProcessInstanceFilterDAO processInstanceFilterDAO = ProcessToolContext.Util
.getThreadProcessToolContext().getProcessInstanceFilterDAO();
processInstanceFilterDAO.deleteFilter(filter);