/** * {@inheritDoc} */ public function renderButton(Model $model) { $template = parent::renderButton($model); // Prepare the json. Not much do display for form elements. $json = json_encode(array('Help' => $this->storage->messages->getHelp($model->getHelpid()))); $template = str_replace('{addjson}', $json, $template); return str_replace('{class}', $model->getName(), $template); }