A Callout asset.

[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 ||
|---|---|
| ## `ad_schedule_targets[]` | `https://developers.google.com/google-ads/api/reference/rpc/v26/AdScheduleInfo` List of non-overlapping schedules specifying all time intervals for which the asset may serve. There can be a maximum of 6 schedules per day, 42 in total. |
| ## `callout_text` | `string` Required. The callout text. The length of this string should be between 1 and 25, inclusive. |
| ## `end_date` | `string` Last date of when this asset is effective and still serving, in yyyy-MM-dd format. |
| ## `start_date` | `string` Start date of when this asset is effective and can begin serving, in yyyy-MM-dd format. |