src/CoreBundle/Controller/Backend/AbstractAddAllController.php
private function checkboxCaption($key, $table, IAttribute $attribute)
    {
        return $this->translator->trans($table . '.' . $key, [$attribute->getName()], 'contao_' . $table);
    }
private function checkboxCaption($key, $table, IAttribute $attribute)
    {
        return $this->translator->trans($table . '.' . $key, [$attribute->getName()], 'contao_' . $table);
    }
Translate the checkbox caption.

@param string     $key       The language sub key.
@param string     $table     The table name.
@param IAttribute $attribute The attribute.

@return string