AI-generated Key Takeaways
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          The content provides a list of various services available in the Ad Manager API reference for version 202411. 
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          It specifically details the NotNullError.Reasonenumeration, which outlines potential causes for a "NotNullError".
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          The NotNullError.Reasoncan indicate if one of the first three arguments passed to a method is null, or if the value is unknown due to the API version.
The reasons for the target error.
- Namespace
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               https://www.google.com/apis/ads/publisher/v202411
| 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. |