AI-generated Key Takeaways
- 
          The page lists various services available in the Ad Manager API v202508. 
- 
          It also details the NotNullError.Reasonenumeration, which provides reasons for a NotNullError.
- 
          Possible reasons for a NotNullError include specific arguments being null (ARG1_NULL, ARG2_NULL, ARG3_NULL), a general null value, or an unknown reason not exposed by the API version. 
The reasons for the target error.
- Namespace
- 
               https://www.google.com/apis/ads/publisher/v202508
| Enumeration | Description | 
|---|---|
| ARG1_NULL | Assuming that a method will not have more than 3 arguments, if it does, return NULL | 
| ARG2_NULL | |
| ARG3_NULL | |
| NULL | |
| UNKNOWN | The value returned if the actual value is not exposed by the requested API version. |