class_docstr: Deprecated. 
code: def invalidation_hash(self):
      pass
  
file_path: catboost/contrib/python/prompt-toolkit/py2/prompt_toolkit/styles/from_pygments.py
imports: from __future__ import unicode_literals
  from .base import Style
  from .from_dict import style_from_dict
label_desc: Use image node_id 2 for calling the PygmentsStyle obj's underlying member method code with example usage: obj.invalidation_hash() without return types