'Get session information about a subject gotten from a
specified IdP/AA.
:param item: Information stored
:return: The session information as a dictionary'

def _get_info(self, item, check_not_on_or_after=True):

    timestamp = item['timestamp']
    if (check_not_on_or_after and (not time_util.not_on_or_after(timestamp))):
        raise ToOld()
    try:
        return item['info']
    except KeyError:
        return None
