@Override
public Component render() {
vl = new VerticalLayout();
Button refreshDocumentList = new Button(getMessage("pt.ext.cmis.list.refresh"));
refreshDocumentList.setIcon(new ClassResource(CmisDocumentListWidget.class, "/img/load-repository.png", getApplication()));
refreshDocumentList.setImmediate(true);
refreshDocumentList.setStyleName(BaseTheme.BUTTON_LINK);
refreshDocumentList.addListener(new ClickListener() {
@Override
public void buttonClick(ClickEvent event) {