LabelOperation

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

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	Label Create operation: No resource name is expected for the new label.
update	Label Update operation: The label is expected to have a valid resource name.
remove	string Remove operation: A resource name for the label being removed, in this format: customers/{customer_id}/labels/{label_id}