code: def visit_leaf(self, leaf):
      try:
          return self._node_to_str_map[leaf]
      except KeyError:
          return super().visit_leaf(leaf)
  
imports: from contextlib import contextmanager
  from typing import Dict, List
label_desc: Use image node_id 3 for calling the RefactoringNormalizer obj's underlying member method code with example usage: obj.visit_leaf(leaf) and returns: self, super