docstr: list the current labconfig settings
docstr_tok: ["list","the","current","labconfig","settings"]
code: def list_default_viewer(self):
      """
      list the current labconfig settings
      """
      self.logger.debug(
          f"Current @jupyterlab/docmanager-extension:plugin in {self.settings_file}"
      )
      for key, value in self.get_viewers().items():
          print(f"{key}: {value}")
  
file_path: jupytext/src/jupytext_config/labconfig.py
imports: import json
  import logging
  from pathlib import Path
label_desc: Use image node_id 4 for calling the LabConfig obj's underlying member method code with example usage: obj.list_default_viewer() without return types