code: def setUp(self):
      self.stubs = tf.compat.v1.test.StubOutForTesting()
  
imports: import os
  import tempfile
  import tensorflow
  from tensorboard.backend.event_processing import io_wrapper
label_desc: Use image node_id 1 for calling the IoWrapperTest obj's underlying member method code with example usage: obj.setUp() without return types