docs: private static void load(final SharedPreferences pPrefs,
                               final Map<String, String> pMap, final String pPrefix) {
          //potential fix for #1079   https://github.com/osmdroid/osmdroid/issues/1079
          if (pPrefix==null || pMap==null) return;
          pMap.clear();
  
          for (final String key : pPrefs.getAll().keySet()) {
              if (key!=null && key.startsWith(pPrefix)) {
                  pMap.put(key.substring(pPrefix.length()), pPrefs.getString(key, null));
              }
          }
      }