class_docstr: Abstract base class for prompt_toolkit styles.
class_docstr_tok: ["Abstract","base","class","for","prompt_toolkit","styles","."]
docstr: Invalidation hash for the style. When this changes over time, the
  renderer knows that something in the style changed, and that everything
  has to be redrawn.
docstr_tok: ["Invalidation","hash","for","the","style",".","When","this","changes","over","time",",","the","renderer","knows","that","something","in","the","style","changed",",","and","that","everything","has","to","be","redrawn","."]
code: def invalidation_hash(self):
      """
      Invalidation hash for the style. When this changes over time, the
      renderer knows that something in the style changed, and that everything
      has to be redrawn.
      """
  
file_path: catboost/contrib/python/prompt-toolkit/py2/prompt_toolkit/styles/base.py
imports: from __future__ import unicode_literals
  from abc import ABCMeta, abstractmethod
  from collections import namedtuple
  from six import with_metaclass
label_desc: Use image node_id 2 for calling the Style obj's underlying member method code with example usage: obj.invalidation_hash() without return types