code: def is_mapping(obj):
      """
      Checks if the object is an instance of MutableMapping.
  
      :param obj: Object to be checked.
      :return: Truth value of whether the object is an instance of
      MutableMapping.
      :rtype: bool
      """
      return isinstance(obj, MutableMapping)
  
label_desc: Use image node_id 1 for calling a global function with example usage: is_mapping(obj) and returns: isinstance