code: def setUp(self):
      super().setUp()
      try:
          # Do a dummy call to triger lazy loading of `get_registered_schemes`
          # before mocking it in tests, otherwise it won't be able to unmock
          # properly (see b/150299895 for more details).
          # TODO(ytjing): Avoid mocking lazy-loaded TF symbols.
          tf.io.gfile.get_registered_schemes()
      except Exception:
          pass
  
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 1 for calling the FileSystemSupportTest obj's underlying member method code with example usage: obj.setUp() without return types