The PreviewInfo structure contains information about the files being uploaded in the update session.
The certificate information of the signed update session content. This field is unset if the update session content is not signed.
Indicates the state of the preview of the update session.
|optional||warnings||array of UpdatesessionPreviewWarningInfo||
The list of warnings raised for this update session. Any warning which is not ignored by the client will, by default, fail the update session during session complete operation. This field is optional and it is only relevant when the value of PreviewInfo.state is AVAILABLE.