code: def get_string_list(self, key, optional=False):
          
          try:
              return self._get_typed_value(key, list, lambda x: x.splitlines(), optional)
          except ConfigTypeError:
              s = self.get_string(key, optional)
              return s.splitlines() if s else []
docs: Tries to fetch a string which could be composed of multiple lines, with each line having some sort of
          separator. Try to convert the string fetched into a list by separating on the given separator, defaulting to
          the newline character. If the string is not present we just return None.
          :param key: The variable to look for
          :param optional: Throw a ConfigKeyNotFoundError if key is not found and this was set to False
          :return: list