code: def tearDown(self):
      stderr = self.stderr.getvalue()
      if stderr:
          # In case of failing tests, let there be debug info.
          print("Stderr:\n%s" % stderr)
  
imports: import argparse
  import io
  import sys
  from unittest import mock
  from tensorboard import program
  from tensorboard import test
  from tensorboard.plugins import base_plugin
  from tensorboard.plugins.core import core_plugin
label_desc: Use image node_id 2 for calling the SubcommandTest obj's underlying member method code with example usage: obj.tearDown() without return types