QR code info to generate promotion QR code.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v26/common/asset_types.proto)

| Fields ||
|---|---|
| ## `qr_code_content` | `string` Promotion message to be encoded in the QR code. |