code: def workerCleanup(info):
          
          assert isinstance(info, WorkerCleanupInfo)
          workflowDir = Toil.getWorkflowDir(info.workflowID, info.workDir)
          workflowDirContents = os.listdir(workflowDir)
          shutdownFileStore(workflowDir, info.workflowID)
          if (info.cleanWorkDir == 'always'
              or info.cleanWorkDir in ('onSuccess', 'onError')
              and workflowDirContents in ([], [cacheDirName(info.workflowID)])):
              shutil.rmtree(workflowDir)
docs: Cleans up the worker node on batch system shutdown. Also see :meth:`supportsWorkerCleanup`.
  
          :param WorkerCleanupInfo info: A named tuple consisting of all the relevant information
                 for cleaning up the worker.