EventListener editButtonListener, EventListener removeButtonListener) {
Button[] buttons = new Button[removeButtonListener != null ? 2 : 1];
Hbox hbox = new Hbox();
buttons[0] = Util.createEditButton(editButtonListener);
hbox.appendChild(buttons[0]);
if (removeButtonListener != null) {
buttons[1] = Util.createRemoveButton(removeButtonListener);
hbox.appendChild(buttons[1]);
}