class_docstr: A format string that isn't evaluated until it's needed.
code: def __str__(self):
      return self.__format_string % self.__args
  
file_path: catboost/contrib/python/hypothesis/py2/hypothesis/internal/lazyformat.py
imports: from __future__ import absolute_import, division, print_function
label_desc: Use image node_id 2 for calling the lazyformat obj's underlying member method code with example usage: obj.__str__() and returns: unknown