code: def test_get_series_name(ts):
      """Test _get_series_name returns the right string."""
      assert _get_series_name(ts) == "Number of airline passengers"
  
file_path: sktime/sktime/transformations/bootstrap/tests/test_mbb.py
imports: import pandas
  import pytest
  from sktime.datasets import load_airline
  from sktime.transformations.bootstrap import MovingBlockBootstrapTransformer, STLBootstrapTransformer
  from sktime.transformations.bootstrap._mbb import _get_series_name, _moving_block_bootstrap
  from sktime.utils.validation._dependencies import _check_soft_dependencies
label_desc: Use image node_id 6 for calling a global function with example usage: test_get_series_name(ts) without return types