The id of the submission to retrieve.
For File submissions only. If TRUE then the attached file is downloaded to the 'downloadLocation'
For File submissions only. The folder in the local file system to which the attached file is to be downloaded.
If omitted, then a default location in a cache is used. See
For File submissions only. if.collision is one of "keep.both", "keep.local", or "overwrite.local",
telling the system what to do if a different file is found at the given local file location.
For File submissions only. If TRUE then deserialize the downloaded file into memory, using the R 'load' command (See
Get a Submission object, given its ID.