code: def test_lightly_subset_dump(self):
      subset, filenames_subset = self.create_subset()
      dataset = subset
  
      out_dir = tempfile.mkdtemp()
      dataset.dump(out_dir)
  
      files_output_dir = LightlyDataset(
          input_dir=out_dir
      ).get_filenames()
      assert set(files_output_dir) == set(dataset.get_filenames())
  
file_path: lightly/tests/data/test_LightlySubset.py
imports: import random
  import tempfile
  import unittest
  from typing import List, Tuple
  from lightly.data.dataset import LightlyDataset
  from lightly.data.lightly_subset import LightlySubset
  from tests.data.test_LightlyDataset import TestLightlyDataset
label_desc: Use image node_id 7 for calling the TestLightlySubset obj's underlying member method code with example usage: obj.test_lightly_subset_dump() without return types