/** * {@inheritDoc} */ public function renderSingleChild(Model $model) { $template = parent::renderSingleChild($model); $json = $model->getJson(); $json['Help'] = $this->storage->messages->getHelp($model->getHelpid()); // Prepare the json. $json = json_encode($json); $template = str_replace('{addjson}', $json, $template); return $template; }