AI-generated Key Takeaways
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          RequiredCollectionError is a type of ApiError that can occur in various services like AdRuleService, AdjustmentService, and AdsTxtService. 
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          This error is related to the size or requirement of a collection, with reasons including REQUIRED, TOO_LARGE, TOO_SMALL, and UNKNOWN. 
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          The error provides fields like fieldPath,fieldPathElements,trigger, anderrorStringwhich are inherited from ApiError to help identify the specific issue.
- Namespace
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               https://www.google.com/apis/ads/publisher/v202505
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| ApiError(inherited) | |
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| RequiredCollectionError | |
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 Enumerations 
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