code: def _is_kernel_dir(path):
      """Is ``path`` a kernel directory?"""
      return os.path.isdir(path) and os.path.isfile(
          pjoin(path, "kernel.json")
      )
  
imports: import errno
  import io
  import json
  import os
  import re
  import shutil
  import warnings
  from ipython_genutils.py3compat import PY3
  from traitlets import HasTraits, List, Unicode, Dict, Set, Bool, Type, CaselessStrEnum
  from traitlets.config import LoggingConfigurable
  from jupyter_core.paths import jupyter_data_dir, jupyter_path, SYSTEM_JUPYTER_PATH
label_desc: Use image node_id 2 for calling a global function with example usage: _is_kernel_dir(path) and returns: unknown