From Xojo Documentation
Returns a FolderItem based on the SaveInfo passed to it.
If the SaveInfo indicates a relative path, the current FolderItem is considered its reference point. If the SaveInfo passed to it is absolute, then the current FolderItem is ignored when resolving the path.
FromSaveInfo returns Nil only if there is not sufficient information in SaveInfo to construct a FolderItem (e.g., using a relative path that causes the parsing to descend below root level).