def METHOD_NAME(self, mode, orig_uri, dest_uri, streetnetwork_path_type, period_extremity):
    """
    This method is used for the caching method. It's connector specific.
    :param orig_uri, dest_uri, mode: matters obviously
    :param streetnetwork_path_type: whether it's a fallback at the beginning,
        the end of journey or a direct path without PT also matters especially for car (to know if we park before or after)
    :param period_extremity: is a PeriodExtremity (a datetime and it's meaning on the fallback period)
    """
    pass