@staticmethod
def get_preference_static(request, prefname):
    """
        Get a preference, or None
        """
    full_name = 'exordium__%s' % prefname
    if request.user.is_authenticated:
        return request.user.preferences[full_name]
    elif full_name in request.session:
        return request.session[full_name]
    else:
        return None
