code: private ArrayList<Pair<String, ?>> getKeyValues() {
  		ArrayList<Pair<String, ?>> keyValPair = new ArrayList<>();
  		Map<String, ?> map = preferenceUtils.getAll();
  		Set<String> strings = map.keySet();
  		Object value;
  		for (String key : strings) {
  			if (!key.contains(SharedPreferenceUtils.keyTestMode)) {
  				value = map.get(key);
  				keyValPair.add(new Pair<String, Object>(key, value));
  			}
  		}
  		return keyValPair;
  	}
docs: Get Key value pair for given shared preference files
  
  @return : Pair of key value files from given shared preferences.