code: def __init__(self):
      self.labellers = {
          "BaseLabeller": BaseLabeller(),
          "DimCoordLabeller": DimCoordLabeller(),
          "IdxLabeller": IdxLabeller(),
          "DimIdxLabeller": DimIdxLabeller(),
          "MapLabeller": MapLabeller(),
          "NoVarLabeller": NoVarLabeller(),
          "NoModelLabeller": NoModelLabeller(),
      }
  
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 1 to create a new Labellers object  with example: obj = Labellers()