code: def label_name():
      return LABEL_NAME
  
file_path: cleanlab/tests/datalab/conftest.py
imports: import numpy
  import pandas
  import pytest
  from datasets import load_dataset
  from datasets.arrow_dataset import Dataset
  from PIL import Image
  from sklearn.neighbors import NearestNeighbors
  from cleanlab.datalab.datalab import Datalab
label_desc: Use image node_id 2 for calling a global function with example usage: label_name() and returns: LABEL_NAME