AI-generated Key Takeaways
- 
          The StreamActivityMonitorService is part of the Google Ad Manager API and includes various error types that inherit from ApiError, such as AuthenticationError and CollectionSizeError. 
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          The RequiredError type within the StreamActivityMonitorService specifically contains a 'reason' field, which is an enumeration of type RequiredError.Reason. 
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          The RequiredError type inherits fields like 'fieldPath', 'fieldPathElements', 'trigger', and 'errorString' from the base ApiError class. 
- 
          The documentation details the namespace for this service as https://www.google.com/apis/ads/publisher/v202505.
- Namespace
- 
               https://www.google.com/apis/ads/publisher/v202505
| Field | |
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| ApiError(inherited) | |
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| RequiredError | |
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 Enumerations 
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