isStringValue() || !empty($o->getRepresentation('attributes')->contents)) { return null; } $b = new BlobValue(); $b->transplant($o); $b->type = 'string'; $children = $this->renderer->renderChildren($b); $header = $this->renderer->renderHeader($o); $header = $this->renderer->renderHeaderWrapper($o, (bool) \strlen($children), $header); return '