code: def _add_run(self, run_name):
      run_path = os.path.join(self.logdir, run_name)
      with test_util.FileWriter(run_path) as writer:
          writer.add_test_summary("foo")
      self.multiplexer.AddRunsFromDirectory(self.logdir)
      self.multiplexer.Reload()
  
imports: import collections.abc
  import contextlib
  import io
  import json
  import mimetypes
  import os
  from unittest import mock
  import zipfile
  import tensorflow
  from werkzeug import test
  from werkzeug import wrappers
  from tensorboard.backend import application
  from tensorboard.backend.event_processing import data_provider
  from tensorboard.backend.event_processing import plugin_event_multiplexer
  from tensorboard.data import provider
  from tensorboard.plugins import base_plugin
  from tensorboard.plugins.core import core_plugin
  from tensorboard.util import test_util
label_desc: Use image node_id 3 for calling the CorePluginTest obj's underlying member method code with example usage: obj._add_run(run_name) without return types