code: def assertDirectoryEmpty(self, path):
      self.assertEqual(len(fileio.listdir(path)), 0)
  
imports: import json
  import os
  import tensorflow
  from tfx.components.pusher import executor
  from tfx.dsl.io import fileio
  from tfx.types import standard_artifacts
  from tfx.types import standard_component_specs
  from tfx.utils import io_utils
  from tfx.utils import path_utils
label_desc: Use image node_id 3 for calling the ExecutorTest obj's underlying member method code with example usage: obj.assertDirectoryEmpty(path) without return types