code: def testCheckFilesystemSupport_notCalled(self):
      with mock.patch.object(tf, "__version__", new="stub"):
          with mock.patch.object(
              data_ingester, "_check_filesystem_support", autospec=True
          ) as mock_check_filesystem_support:
              data_ingester.LocalDataIngester(
                  flags=FakeFlags(logdir="logdir")
              )
      mock_check_filesystem_support.assert_not_called()
  
imports: import ntpath
  import os
  import posixpath
  import time
  from unittest import mock
  from tensorboard import test
  from tensorboard.backend.event_processing import data_ingester
  from tensorboard.compat import tf
label_desc: Use image node_id 9 for calling the FileSystemSupportTest obj's underlying member method code with example usage: obj.testCheckFilesystemSupport_notCalled() without return types