AI-generated Key Takeaways
- 
          The ProposalLineItemService lists all errors for executing operations on proposal line items. 
- 
          This service inherits from ApiError and includes specific errors like ProposalLineItemActionError. 
- 
          Errors have fields such as fieldPath, fieldPathElements, trigger, and errorString. 
- 
          ProposalLineItemActionError includes reasons like operations not being applicable due to the proposal state or mandatory product requirements. 
- 
          An "UNKNOWN" reason indicates the actual value is not exposed by the requested API version. 
Lists all errors for executing operations on proposal line items.
- Namespace
- 
               https://www.google.com/apis/ads/publisher/v202411
| 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. | 
| ProposalLineItemActionError | |
| 
                            | 
                            The error reason represented by an enum. Enumerations 
 |