docs: def insert_element_to_dict_of_list(dict_of_list, key, parser):
      """
      Utility method
  
      :param dict_of_list:
      :param key:
      :param parser:
      :return:
      """
      if key in dict_of_list.keys():
          dict_of_list[key].append(parser)
      else:
          dict_of_list[key] = [parser]