docs: def dict_update(base_dict, update_dict):
      """Return an updated dictionary.
  
      If ``update_dict`` is a dictionary it will be used to update the `
      `base_dict`` which is then returned.
  
      :param request_kwargs: ``dict``
      :param kwargs: ``dict``
      :return: ``dict``
      """
      if isinstance(update_dict, dict):
          base_dict.update(update_dict)
  
      return base_dict