code: def testCheckFilesystemSupport_importTFIO(self):
      with mock.patch.object(
          tf.io.gfile,
          "get_registered_schemes",
          autospec=True,
          return_value=["file", ""],
      ) as mock_get_registered_schemes:
          with mock.patch(
              "builtins.__import__",
              side_effect=self.fake_import(
                  _TENSORFLOW_IO_MODULE, success=True
              ),
          ) as mock_import:
              data_ingester._check_filesystem_support(
                  ["tmp/demo", "s3://bucket/123"]
              )
      self.assertEqual("tensorflow_io", mock_import.call_args[0][0])
      mock_get_registered_schemes.assert_called_once()
  
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 4 for calling the FileSystemSupportTest obj's underlying member method code with example usage: obj.testCheckFilesystemSupport_importTFIO() without return types