AI-generated Key Takeaways
- 
          The content lists various Ad Manager API services including AdRuleService, AdjustmentService, and AdsTxtService. 
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          It details the inheritance structure for CommonError, showing it inherits from ApiError. 
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          The CommonError includes fields such as fieldPath, fieldPathElements, trigger, errorString, and reason. 
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          The reason field in CommonError has several enumerations like NOT_FOUND, ALREADY_EXISTS, and UNSUPPORTED_OPERATION. 
- Namespace
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               https://www.google.com/apis/ads/publisher/v202502
| Field | |
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| ApiError(inherited) | |
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| CommonError | |
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 Enumerations 
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