code: def list(self):
          
          backups = []
          for d in glob(join(self.backup_directory, '*')):
              backups.append(WorkspaceBackup.from_path(d))
          backups.sort(key=lambda b: b.lastmod, reverse=True)
          return backups
docs: List all backups as WorkspaceBackup objects, sorted descending by lastmod.