AI-generated Key Takeaways
- 
          The webpage provides a comprehensive list of Google Ad Manager API services, including links to their respective documentation. 
- 
          The RequiredCollectionError.Reasonnamespace and its enumeration values describe reasons for errors related to collection size or presence within these services.
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          Possible reasons for RequiredCollectionErrorinclude missing, too large, too small, or unknown collection issues.
- Namespace
- 
               https://www.google.com/apis/ads/publisher/v202508
| Enumeration | Description | 
|---|---|
| REQUIRED | A required collection is missing. | 
| TOO_LARGE | Collection size is too large. | 
| TOO_SMALL | Collection size is too small. | 
| UNKNOWN | The value returned if the actual value is not exposed by the requested API version. |