AI-generated Key Takeaways
- 
          A single operation on a campaign group can be create, update, or remove. 
- 
          The update_maskfield uses a FieldMask to specify which resource fields are modified during an update.
- 
          The operationfield determines the type of mutate operation being performed on the campaign group.
- 
          Create operations expect no resource name, while update operations expect a valid resource name and remove operations expect a resource name in a specific format. 
A single operation (create, update, remove) on a campaign group.
| Fields | |
|---|---|
| 
 | FieldMask that determines which resource fields are modified in an update. | 
| Union field 
 | |
| 
 | Create operation: No resource name is expected for the new campaign group. | 
| 
 | Update operation: The campaign group is expected to have a valid resource name. | 
| 
 | 
 Remove operation: A resource name for the removed campaign group is expected, in this format: 
 |