protected Optional<LogoutRequest> getLogoutRequest(final HttpServletRequest request) {
        val logoutRequest = WebUtils.getSingleLogoutRequest(request);
        return Optional.ofNullable(logoutRequest).map(req -> {
            val decodedRequest = EncodingUtils.decodeBase64(logoutRequest);
            return SamlUtils.transformSamlObject(configurationContext.getOpenSamlConfigBean(),
                decodedRequest, LogoutRequest.class);
        });
    }
This is {@link SamlIdPSingleLogoutRedirectionStrategy}.

@author Misagh Moayyed
@since 6.3.0
support/cas-server-support-saml-idp-web/src/main/java/org/apereo/cas/support/saml/web/idp/profile/slo/SamlIdPSingleLogoutRedirectionStrategy.java