protected String enhanceRedirectUrl(final CallContext ctx, final Config config, final Client client, final String redirectUrl) {
        return redirectUrl;
    }
<p>enhanceRedirectUrl.</p>

@param ctx a {@link CallContext} object
@param config a {@link Config} object
@param client a {@link Client} object
@param redirectUrl a {@link String} object
@return a {@link String} object
pac4j-core/src/main/java/org/pac4j/core/engine/DefaultLogoutLogic.java