_desktop.getDevice().isCacheable();
if (!cacheable) {
//Bug 1520444
exec.setResponseHeader("Pragma", "no-cache");
exec.addResponseHeader("Cache-Control", "no-cache");
exec.addResponseHeader("Cache-Control", "no-store");
//exec.addResponseHeader("Cache-Control", "private");
//exec.addResponseHeader("Cache-Control", "max-age=0");
//exec.addResponseHeader("Cache-Control", "s-maxage=0");
//exec.addResponseHeader("Cache-Control", "must-revalidate");
//exec.addResponseHeader("Cache-Control", "proxy-revalidate");