code: def get_viewers(self):
      return self.config.setdefault(
          "@jupyterlab/docmanager-extension:plugin", {}
      ).setdefault("defaultViewers", {})
  
file_path: jupytext/src/jupytext_config/labconfig.py
imports: import json
  import logging
  from pathlib import Path
label_desc: Use image node_id 3 for calling the LabConfig obj's underlying member method code with example usage: obj.get_viewers() and returns: self