Retrieves a file that has been moved to the trash.
Please note that only if the file itself has been moved to the
trash can it be retrieved with this API call. If instead one of
its parent folders was moved to the trash, only that folder
can be inspected using the
GET /folders/:id/trash [blocked] API.
To list all items that have been moved to the trash, please
use the GET /folders/trash/items [blocked]
API.