code: def _get_subdirectories(self, a_dir):
      return [
          os.path.join(a_dir, name)
          for name in os.listdir(a_dir)
          if os.path.isdir(os.path.join(a_dir, name))
      ]
  
file_path: catboost/catboost/python-package/catboost/widget/ipythonwidget.py
imports: import os
  import json
  from threading import Thread, Event
  from traitlets import Unicode, Dict, default
  from IPython.display import display
  from ipywidgets import DOMWidget, Layout, widget_serialization
label_desc: Use image node_id 5 for calling the MetricVisualizer obj's underlying member method code with example usage: obj._get_subdirectories(a_dir) and returns: unknown