AI-generated Key Takeaways
- 
          
The page provides a list of services including AdRuleService, AdjustmentService, and AdsTxtService, among many others.
 - 
          
The NotNullError.Reason enumeration lists possible reasons for a Null error, including specific argument being null or an unknown issue.
 - 
          
The namespace for these services and errors is
https://www.google.com/apis/ads/publisher/v202508. 
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. |