protected boolean isFrontLogoutRequest(final WebContext context) {
        return WebContextHelper.isGet(context)
                && context.getRequestParameter(CasConfiguration.LOGOUT_REQUEST_PARAMETER).isPresent();
    }
<p>isFrontLogoutRequest.</p>

@param context a {@link WebContext} object
@return a boolean
pac4j-cas/src/main/java/org/pac4j/cas/credentials/extractor/CasCredentialsExtractor.java