AI-generated Key Takeaways
- 
          The page lists various services available in the Google Ad Manager API, version v202508. 
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          Each service is linked to its reference documentation for the RequiredCollectionError.Reason.
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          The RequiredCollectionError.Reasonenumeration defines possible reasons for errors related to collection size or presence.
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          The defined reasons for RequiredCollectionErrorincludeREQUIRED,TOO_LARGE,TOO_SMALL, andUNKNOWN.
- Namespace
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               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. |