AI-generated Key Takeaways
- 
          The AdUnitHierarchyError is an ApiError that occurs when creating an AdUnit with an invalid hierarchy. 
- 
          This error can be caused by an invalid depth or an invalid parent for the AdUnit. 
- 
          The fieldPath, fieldPathElements, trigger, and errorString are inherited fields from ApiError providing details about the error. 
- 
          The reason field specifically indicates the cause of the AdUnit hierarchy error, such as INVALID_DEPTH, INVALID_PARENT, or UNKNOWN. 
Caused by creating an AdUnit object with an invalid hierarchy.
- 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. | 
| AdUnitHierarchyError | |
| 
                            | 
 Enumerations 
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