code: def run(self, flags):
      pass
  
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 4 for calling the _TestSubcommand obj's underlying member method code with example usage: obj.run(flags) without return types