function displaySettingsPanel(&$wrapper, $errors = NULL)
 {
     parent::displaySettingsPanel($wrapper, $errors);
     $div = new XMLElement('div', NULL, array('class' => 'compact'));
     $label = Widget::Label();
     $input = Widget::Input('fields[' . $this->get('sortorder') . '][developers_only]', 'yes', 'checkbox');
     if ($this->get('developers_only') == 'yes') {
         $input->setAttribute('checked', 'checked');
     }
     $label->setValue(__('%s Value editable by developers only', array($input->generate())));
     $div->appendChild($label);
     parent::appendShowColumnCheckbox($div);
     $wrapper->appendChild($div);
 }