/**
  * Transform a translatable CheckboxField to show the field value from the default language
  * in the label.
  * 
  * @param FormField $nonEditableField The readonly field to contain the original value
  * @param FormField $originalField The original editable field containing the translated value
  * @return CheckboxField The field with a modified label
  */
 protected function transformCheckboxField(CheckboxField $nonEditableField, CheckboxField $originalField)
 {
     $label = $originalField->Title();
     $fieldName = $originalField->getName();
     $value = $this->original->{$fieldName} ? _t('Translatable_Transform.CheckboxValueYes', 'Yes') : _t('Translatable_Transform.CheckboxValueNo', 'No');
     $originalLabel = _t('Translatable_Transform.OriginalCheckboxLabel', 'Original: {value}', 'Addition to a checkbox field label showing the original value of the translatable field.', array('value' => $value));
     $originalField->setTitle($label . ' <span class="originalvalue">(' . $originalLabel . ')</span>');
     return $originalField;
 }