code: def test_length(self):
      for stream, length in self.stream_lengths.items():
          with self.subTest(stream=stream, length=length):
              bench = CTrL(stream)
              self.assertEqual(length, bench.n_experiences)
  
file_path: avalanche/tests/benchmarks/classic/test_ctrl.py
imports: import unittest
  from pathlib import Path
  from tempfile import TemporaryDirectory
  import torch
  from tests.unit_tests_utils import FAST_TEST, is_github_action
label_desc: Use image node_id 1 for calling the CTrLTests obj's underlying member method code with example usage: obj.test_length() without return types