code: def test_empty_logdir(self):
      logdir = self.get_temp_dir()
      loader = self._create_logdir_loader(logdir)
      # Default state is empty.
      self.assertEmpty(list(loader.get_run_events()))
      loader.synchronize_runs()
      # Still empty, since there's no data.
      self.assertEmpty(list(loader.get_run_events()))
  
file_path: tensorboard/tensorboard/uploader/logdir_loader_test.py
imports: import os.path
  import shutil
  from tensorboard.uploader import logdir_loader
  from tensorboard import test
  from tensorboard.backend.event_processing import directory_loader
  from tensorboard.backend.event_processing import event_file_loader
  from tensorboard.backend.event_processing import io_wrapper
  from tensorboard.util import test_util
label_desc: Use image node_id 4 for calling the LogdirLoaderTest obj's underlying member method code with example usage: obj.test_empty_logdir() without return types