ageCell.add(new AgeLabel(person.getAge()));
ageCell.setWidth("5em");
ageCell.setAlignment(HasHorizontalAlignment.ALIGN_CENTER, HasVerticalAlignment.ALIGN_MIDDLE);
tr.add(ageCell);
final TableCell removeCell = tr.newTableDataCell();
removeCell.addStyleName("remove");
final Button button = new Button("Remove");
button.addClickListener(new ClickListener() {
public void onClick(final Widget sender) {
ot.getObjects().remove(person);