AI-generated Key Takeaways
- 
          The webpage lists various Ad Manager services including AdjustmentService, CompanyService, CreativeService, and more. 
- 
          It details inheritance relationships, showing that various specific errors, such as ApiVersionError and AssetError, inherit from the general ApiError. 
- 
          The NullError is specifically defined as errors associated with the violation of a NOT NULL check within the OrderService context. 
- 
          The NullError includes a reasonfield, which is an enum with the valueNULL_CONTENT, indicating that a specified list or container must not contain any null elements.
Errors associated with violation of a NOT NULL check.
- 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 
 |