docs: protected static File findRawDir(File dir) {
  		for (int i = 0; dir != null && i < 20; i++) {
  			File rawDir = findResRawDir(dir);
  			if (rawDir != null) {
  				return rawDir;
  			}
  			dir = dir.getParentFile();
  		}
  		return null;
  	}