private TextBox buildParameterTextBox(String text) {
   TextBox paramBox = new TextBox();
   paramBox.setText(text);
   paramBox.setWidth("135");
   paramBox.addChangeHandler(
       new ChangeHandler() {
         public void onChange(ChangeEvent event) {
           enableSaveButton();
         }
       });
   return paramBox;
 }
 private String getParameterValue(HorizontalPanel entry) {
   TextBox key = (TextBox) entry.getWidget(2);
   return key.getText();
 }