code: def test_label_encoder_across_multiple_columns():
      from examples.getting_started.plot_label_encoder_across_multiple_columns import (
          main,
      )
  
      main()
  
file_path: Neuraxle/testing_neuraxle/examples/test_examples.py
imports: import pytest
  from py._path.local import LocalPath
label_desc: Use image node_id 5 for calling a global function with example usage: test_label_encoder_across_multiple_columns() without return types