Represents the metadata of the long-running operation.
The time the operation was created.
The time the operation finished running.
Server-defined resource path for the target
of the operation.
Name of the verb executed by the operation.
Human-readable status of the operation, if
Identifies whether the user has requested cancellation of
the operation. Operations that have successfully been
cancelled have [Operation.error] value with a
`google.rpc.Status.code][google.rpc.Status.code]` of 1,
corresponding to ``Code.CANCELLED``.