Enum describing possible campaign shared set errors.

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

| Enums ||
|---|---|
| ## `SHARED_SET_ACCESS_DENIED` | The shared set belongs to another customer and permission isn't granted. |
| ## `UNKNOWN` | The received error code is not known in this version. |
| ## `UNSPECIFIED` | Enum unspecified. |