code: def setUp(self):
      self._mock_scalars_plugin = mock.create_autospec(
          scalars_plugin.ScalarsPlugin
      )
      self._mock_scalars_plugin.scalars_impl.side_effect = (
          self._mock_scalars_impl
      )
  
file_path: tensorboard/tensorboard/plugins/hparams/list_metric_evals_test.py
imports: from unittest import mock
  import tensorflow
  from google.protobuf import text_format
  from tensorboard import context
  from tensorboard.plugins.hparams import api_pb2
  from tensorboard.plugins.hparams import list_metric_evals
  from tensorboard.plugins.scalar import scalars_plugin
label_desc: Use image node_id 1 for calling the ListMetricEvalsTest obj's underlying member method code with example usage: obj.setUp() without return types