.getInitParameter(ParametredHttpServlet.USE_GZIP_PARAMETER));
.getInitParameter(ConfiguredHttpServlet.USE_GZIP_PARAMETER));
    public void initialize(FacesContext facesContext) {        useGzip = "true".equalsIgnoreCase(facesContext.getExternalContext()                .getInitParameter(ParametredHttpServlet.USE_GZIP_PARAMETER));    }