code: def clear(self):
      self.__end = end = []
      end += [None, end, end]  # sentinel node for doubly linked list
      self.__map = {}  # key --> [key, prev, next]
      dict.clear(self)
  
file_path: catboost/contrib/python/simplejson/py2/simplejson/ordered_dict.py
imports: from UserDict import DictMixin
label_desc: Use image node_id 2 for calling the OrderedDict obj's underlying member method code with example usage: obj.clear() without return types