code: def cd(self, new_dir: str) -> None:
      """"""
      os.chdir(new_dir)
      LOG.record(shell(f"cd {new_dir} # [now: {os.getcwd()}]"))
  
file_path: bokeh/release/system.py
imports: from __future__ import annotations
  import os
  import sys
  from subprocess import PIPE, STDOUT, run
  from typing import Any
  from .logger import LOG
  from .ui import shell
label_desc: Use image node_id 4 for calling the System obj's underlying member method code with example usage: obj.cd(new_dir) without return types