CampaignBudgetOperation

A single operation (create, update, remove) on a campaign budget.

Fields
update_mask	FieldMask FieldMask that determines which resource fields are modified in an update.
Union field operation operation. The mutate operation. operation can be only one of the following:
create	CampaignBudget Create operation: No resource name is expected for the new budget.
update	CampaignBudget Update operation: The campaign budget is expected to have a valid resource name.
remove	string Remove operation: A resource name for the removed budget is expected, in this format: customers/{customer_id}/campaignBudgets/{budget_id}