code: def setUp(self):
      self._mock_multiplexer = mock.create_autospec(
          plugin_event_multiplexer.EventMultiplexer
      )
      self._mock_tb_context = base_plugin.TBContext(
          multiplexer=self._mock_multiplexer
      )
  
file_path: tensorboard/tensorboard/plugins/hparams/download_data_test.py
imports: from unittest import mock
  from google.protobuf import text_format
  import tensorflow
  from tensorboard.backend.event_processing import plugin_event_multiplexer
  from tensorboard.plugins import base_plugin
  from tensorboard.plugins.hparams import api_pb2
  from tensorboard.plugins.hparams import backend_context
  from tensorboard.plugins.hparams import download_data
label_desc: Use image node_id 1 for calling the DownloadDataTest obj's underlying member method code with example usage: obj.setUp() without return types