175 pub struct Operation {  struct
178     km_op: Strong<dyn IKeyMintOperation>,  argument
179     last_usage: Mutex<Instant>,
180     outcome: Mutex<Outcome>,
181     owner: u32, // Uid of the operation's owner.
182     auth_info: Mutex<AuthInfo>,
183     forced: bool,
184     logging_info: LoggingInfo,
218 impl Operation {  impl
456 impl Drop for Operation {  implementation
502     ) -> Arc<Operation> {  in create_operation()
540     fn get(&self, index: usize) -> Option<Arc<Operation>> {  in get()