AI-generated Key Takeaways
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RequiredCollectionError represents an error related to collections in various services within the Google Ad Manager API.
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Possible reasons for a RequiredCollectionError include a missing required collection, the collection size being too large or too small, or an unknown error.
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The error is associated with a namespace of
https://www.google.com/apis/ads/publisher/v202508. - 
          
Various services in the Google Ad Manager API, such as AdRuleService, AdjustmentService, and AdsTxtService, can return a RequiredCollectionError.
 
- 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. |