AI-generated Key Takeaways
- 
          Custom fields are recognized for entity types like LineItem, Order, Creative, Proposal, and ProposalLineItem. 
- 
          The UNKNOWNenumeration value is returned if the actual value is not exposed by the requested API version.
                  Service
               
               
                  CustomFieldService
               
            
                  Dependencies
               
               
                  CustomField
                  
            ▼
                  CustomFieldEntityType
               Entity types recognized by custom fields
- Namespace
- 
               https://www.google.com/apis/ads/publisher/v202411
| Enumeration | Description | 
|---|---|
| LINE_ITEM | Represents the LineItem type. | 
| ORDER | Represents the Order type. | 
| CREATIVE | Represents the Creative type. | 
| PROPOSAL | Represents the Proposal type. | 
| PROPOSAL_LINE_ITEM | Represents the ProposalLineItem type. | 
| UNKNOWN | The value returned if the actual value is not exposed by the requested API version. |