code: def testNoLayoutFound(self):
      # The bar directory contains no layout.
      ctx = context.RequestContext()
      local_plugin = self.createPlugin(os.path.join(self.logdir, "bar"))
      self.assertDictEqual({}, local_plugin.layout_impl(ctx, "exp_id"))
  
imports: import csv
  import io
  import json
  import os
  import numpy
  import tensorflow
  from werkzeug import test
  from werkzeug import wrappers
  from google.protobuf import json_format
  from tensorboard.backend import application
  from tensorboard import context
  from tensorboard.backend.event_processing import data_provider
  from tensorboard.backend.event_processing import plugin_event_multiplexer
  from tensorboard.plugins import base_plugin
  from tensorboard.plugins.custom_scalar import custom_scalars_plugin
  from tensorboard.plugins.custom_scalar import layout_pb2
  from tensorboard.plugins.custom_scalar import summary
  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 8 for calling the CustomScalarsPluginTest obj's underlying member method code with example usage: obj.testNoLayoutFound() without return types