code: def _default_layout(self):
      return Layout(height="500px", align_self="stretch")
  
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 1 for calling the MetricWidget obj's underlying member method code with example usage: obj._default_layout() and returns: Layout