code: def load_server(self, run_names):
      plugin = self.load_plugin(run_names)
      wsgi_app = application.TensorBoardWSGI([plugin])
      server = werkzeug_test.Client(wsgi_app, wrappers.Response)
      return server
  
imports: import csv
  import io
  import json
  import os.path
  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.backend.event_processing import tag_types
  from tensorboard.plugins import base_plugin
  from tensorboard.plugins.scalar import scalars_plugin
  from tensorboard.plugins.scalar import summary
  from tensorboard.util import test_util
label_desc: Use image node_id 2 for calling the ScalarsPluginTest obj's underlying member method code with example usage: obj.load_server(run_names) and returns: server