AI-generated Key Takeaways
- 
          The RequiredSizeError is used for validating the Size of creatives and line items within the Ad Manager API. 
- 
          This error includes inherited fields like fieldPath, fieldPathElements, trigger, and errorString from ApiError. 
- 
          The RequiredSizeError has a specific reason field which can indicate if a required size is missing or if the creative sizes are not a subset of the line item sizes. 
- 
          Possible reasons for the error include REQUIRED, NOT_ALLOWED, and UNKNOWN. 
A list of all errors to be used for validating Size.
- Namespace
- 
               https://www.google.com/apis/ads/publisher/v202502
| Field | |
|---|---|
| ApiError(inherited) | |
| 
                            | 
                            The OGNL field path to identify cause of error. | 
| 
                            | A parsed copy of the field path. For example, the field path "operations[1].operand" corresponds to this list: {FieldPathElement(field = "operations", index = 1), FieldPathElement(field = "operand", index = null)}. | 
| 
                            | 
                            The data that caused the error. | 
| 
                            | 
                            A simple string representation of the error and reason. | 
| RequiredSizeError | |
| 
                            | 
 Enumerations 
 |