def METHOD_NAME(self):
    prev = get_enabled_features(self.event)
    feature = get_feature_definition(request.view_args['feature'])
    changed = set()
    if set_feature_enabled(self.event, feature.name, False):
        current = get_enabled_features(self.event)
        changed = prev - current
        flash(ngettext('Feature disabled: {features}', 'Features disabled: {features}', len(changed))
              .format(features=format_feature_names(changed)), 'warning')
        logger.info("Feature '%s' for event %s disabled by %s", feature.name, self.event, session.user)
        self.event.log(EventLogRealm.management, LogKind.negative, 'Features',
                       f'Disabled {feature.friendly_name}', session.user)
    return jsonify_data(enabled=False, event_menu=self.render_event_menu(), changed=list(changed))