code: public static HashMap<Integer, Integer> readIntIntMapFromGlob(Path glob, FileSystem fs)
  	    throws IOException {
  		FileStatus status[] = fs.globStatus(glob);
  		HashMap<Integer, Integer> ret = new HashMap<Integer, Integer>();
  		for(FileStatus fileS : status) {
  			ret.putAll(readIntIntMap(fileS.getPath(), fs));
  		}
  		return ret;
  	}
docs: Reads maps of integer -> integer from glob paths like "folder/part-r*"