/**
* Gets a message from the resource bundle.
*
* @return null if no found
*/
private static final String getFromBundle(int code, Locale locale) {
final BundleInfo bi = Aide.getBundleInfo(code);
final PropertyBundle rb = // case insensitive
PropertyBundle.getBundle(bi.filename, locale, true);
if (rb != null) return rb.getProperty(Integer.toHexString(code - getType(code)));
throw new IllegalStateException("Missing resource: " + bi + " locale=" + locale);
}