private Event getFinishLogoutEvent() {
        return eventFactory.event(this, CasWebflowConstants.TRANSITION_ID_FINISH);
    }
Logout action for front SLO : find the next eligible service and perform front logout.

@author Jerome Leleu
@since 4.0.0
support/cas-server-support-actions-core/src/main/java/org/apereo/cas/web/flow/logout/FrontChannelLogoutAction.java