AI-generated Key Takeaways
- 
          The MutateRecommendationSubscriptionoperation allows for creating or updating a recommendation subscription.
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          The update_maskfield is optional and specifies which fields are modified in an update.
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          The operationfield is required and can be eithercreateorupdate.
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          A create operation does not require a resource name for the new subscription, while an update operation expects a valid resource name. 
A single operation (create, update) on a recommendation subscription. [RecommendationSubscriptionService.MutateRecommendationSubscription]
| Fields | |
|---|---|
| 
 | Optional. FieldMask that determines which resource fields are modified in an update. | 
| Union field 
 | |
| 
 | Create operation: No resource name is expected for the new subscription. | 
| 
 | Update operation: The subscription is expected to have a valid resource name. |