AI-generated Key Takeaways
- 
          The page lists various Ad Manager API services with links to their CommonError documentation. 
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          It details the inheritance hierarchy, showing CommonError as a type of ApiError. 
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          The CommonError object includes fields inherited from ApiError and a specific reason field. 
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          The reason field for CommonError is an enumeration with values indicating different error types like NOT_FOUND, ALREADY_EXISTS, and UNSUPPORTED_OPERATION. 
- Namespace
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               https://www.google.com/apis/ads/publisher/v202505
| Field | |
|---|---|
| ApiError(inherited) | |
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| CommonError | |
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 Enumerations 
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