@Override
    public Collection<String> getCandidateStatesForMultifactorAuthentication() {
        return List.of(CasWebflowConstants.STATE_ID_X509_START);
    }
This is {@link X509CasMultifactorWebflowCustomizer}.

@author Misagh Moayyed
@since 6.2.0
support/cas-server-support-x509-webflow/src/main/java/org/apereo/cas/web/flow/X509CasMultifactorWebflowCustomizer.java