metadata property
{ createTime: The time the operation was created.
endTime: The time the operation finished running. target:
Server-defined resource path for the target of the operation. verb: Name
of the verb executed by the operation. statusDetail: Human-readable
status of the operation, if any. cancelRequested: 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 of 1, corresponding to Code.CANCELLED.
apiVersion: API version used to start the operation. }
The values for Object must be JSON objects. It can consist of num,
String, bool and null as well as Map and List values.
Implementation
core.Map<core.String, core.Object?>? metadata;