OptionaltimeoutOverall budget for the snapshot call, in milliseconds. Defaults to 55000. If it elapses before a snapshot completes, the call is cancelled and an error is thrown.
OptionalttlLifetime of the resulting image in milliseconds, as a hard cutoff
measured from creation. Defaults to 30 days. Pass null to retain
the image indefinitely.
Optional parameters for Sandbox.snapshotFilesystem().