LINE Official Account information to use for messaging.

[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 ||
|---|---|
| ## `line_id` | `string` Required. The ID of the advertiser's LINE Official Account. It can be a basic ID or a premium ID. Must begin with '@'. Examples: '@line_business', '@abc1234d'. |