code: private void setupUI(final String labelText) {
  		WButton dupBtn = new WButton("Duplicate");
  		dupBtn.setAction(new DuplicateAction());
  
  		WButton clrBtn = new WButton("Clear");
  		clrBtn.setAction(new ClearAction());
  
  		add(new WLabel(labelText, textFld));
  		add(textFld);
  		add(dupBtn);
  		add(clrBtn);
  		add(new WAjaxControl(dupBtn, this));
  		add(new WAjaxControl(clrBtn, this));
  	}
docs: Add the controls to the UI.
  @param labelText the text to show in the duplicator field's label.