AI-generated Key Takeaways
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          The page provides a comprehensive list of available services within the Ad Manager API, including various ad-related functionalities like AdRuleService, CreativeService, and ReportService. 
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          It details the inheritance hierarchy, showing that FeatureError is a type of ApiError and listing other error types like AuthenticationError and PermissionError that also inherit from ApiError. 
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          The Namespace for these services and errors is identified as https://www.google.com/apis/ads/publisher/v202505.
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          Key fields for ApiError, such as fieldPathandtrigger, and for FeatureError, specificallyreason, are outlined.
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          The possible enumerations for the reasonfield of FeatureError are provided, includingMISSING_FEATUREandUNKNOWN.
- Namespace
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               https://www.google.com/apis/ads/publisher/v202505
| Field | |
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| ApiError(inherited) | |
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| FeatureError | |
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 Enumerations 
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