default Collection<String> getCandidateStatesForMultifactorAuthentication() {
        return List.of();
    }
Gets candidate states for multifactor authentication.

@return the candidate states for multifactor authentication
core/cas-server-core-webflow-mfa-api/src/main/java/org/apereo/cas/web/flow/configurer/CasMultifactorWebflowCustomizer.java