AI-generated Key Takeaways
- 
          The content lists various Ad Manager API services including AdjustmentService, CompanyService, and CreativeService. 
- 
          A hierarchy of errors is presented, with ApiError as the base class and NullError being one of the specific error types. 
- 
          The NullError is caused by providing a non-null value for an attribute that is expected to be null. 
- 
          Key fields for errors, including fieldPath, trigger, and errorString, are inherited from ApiError. 
- 
          The NullError specifically includes a 'reason' field, which uses an enum with values like 'NOT_NULL' and 'UNKNOWN'. 
Caused by supplying a non-null value for an attribute that should be null.
- 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. | 
| NullError | |
| 
                            | The error reason represented by an enum. Enumerations 
 |