AI-generated Key Takeaways
- 
          CustomFieldDataType defines the allowed data types for CustomField objects. 
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          The available data types include STRING, NUMBER, TOGGLE, DROP_DOWN, and UNKNOWN. 
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          STRING fields have a maximum length of 255 characters. 
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          DROP_DOWN fields use the IDs of CustomFieldOption objects as values. 
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          UNKNOWN indicates that the actual value is not exposed by the API version. 
The data types allowed for CustomField objects.
- Namespace
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               https://www.google.com/apis/ads/publisher/v202502
| Enumeration | Description | 
|---|---|
| STRING | A string field. The max length is 255 characters. | 
| NUMBER | A number field. | 
| TOGGLE | A boolean field. Values may be "true", "false", or empty. | 
| DROP_DOWN | A drop-down field. Values may only be the ids of CustomFieldOption objects. | 
| UNKNOWN | The value returned if the actual value is not exposed by the requested API version. |