code: def test_fetch_not_presented(self):
      returned = self.sut.fetch_one(
          Path(f"{self.tempDir.name}/test1.file")
      )
  
      self.assertIsNone(returned)
  
file_path: neptune-client/tests/unit/neptune/new/internal/artifacts/test_local_file_hash_storage.py
imports: import datetime
  import tempfile
  import unittest
  from pathlib import Path
  from mock import patch
  from neptune.internal.artifacts.local_file_hash_storage import LocalFileHashStorage
label_desc: Use image node_id 3 for calling the TestLocalFileHashStorage obj's underlying member method code with example usage: obj.test_fetch_not_presented() without return types