code: def labellers():
      return Labellers()
  
file_path: arviz/arviz/tests/base_tests/test_labels.py
imports: import pytest
  from ...labels import BaseLabeller, DimCoordLabeller, DimIdxLabeller, IdxLabeller, MapLabeller, NoModelLabeller, NoVarLabeller
label_desc: Use image node_id 2 for calling a global function with example usage: labellers() and returns: Labellers