AI-generated Key Takeaways
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The provided content lists various services available within the Ad Manager API, including services for managing ad rules, adjustments, ads.txt, audience segments, and many others.
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It also details the
NotNullErrordependency and itsReasonenumeration, which outlines possible reasons for null errors such as null arguments or an unknown cause. - 
          
The
NotNullError.Reasonenumeration specifies reasons likeARG1_NULL,ARG2_NULL,ARG3_NULLfor null arguments up to three,NULLfor a generic null, andUNKNOWNfor unexposed values. 
The reasons for the target error.
- Namespace
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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. |