class_docstr: :py:func:`parso.load_grammar` returns instances of this class.
  
  Creating custom none-python grammars by calling this is not supported, yet.
class_docstr_tok: [":","py",":","func",":","`","parso.load_grammar","`","returns","instances","of","this","class",".","Creating","custom","none-python","grammars","by","calling","this","is","not","supported",",","yet","."]
code: def refactor(self, base_node, node_to_str_map):
      return RefactoringNormalizer(node_to_str_map).walk(base_node)
  
imports: import hashlib
  import os
  import sys
  import pkgutil
  from parso._compatibility import FileNotFoundError, is_pypy
  from parso.pgen2 import generate_grammar
  from parso.utils import split_lines, python_bytes_to_unicode, parse_version_string
  from parso.python.diff import DiffParser
  from parso.python.tokenize import tokenize_lines, tokenize
  from parso.python.token import PythonTokenTypes
  from parso.cache import parser_cache, load_module, try_to_save_module
  from parso.parser import BaseParser
  from parso.python.parser import Parser
  from parso.python.errors import ErrorFinderConfig
  from parso.python import pep8
  from parso.file_io import FileIO, KnownContentFileIO
  from parso.normalizer import RefactoringNormalizer
label_desc: Use image node_id 6 for calling the Grammar obj's underlying member method code with example usage: obj.refactor(base_node, node_to_str_map) and returns: RefactoringNormalizer