docs: public static String retrieveKey(final Context aContext, final String aKey) {
  
          // get the key from the manifest
          final PackageManager pm = aContext.getPackageManager();
          try {
              final ApplicationInfo info = pm.getApplicationInfo(aContext.getPackageName(),
  					PackageManager.GET_META_DATA);
              if (info.metaData == null) {
                  Log.i(IMapView.LOGTAG,"Key %s not found in manifest"+aKey);
              } else {
                  final String value = info.metaData.getString(aKey);
                  if (value == null) {
                      Log.i(IMapView.LOGTAG,"Key %s not found in manifest"+aKey);
                  } else {
                      return value.trim();
                  }
              }
          } catch (final PackageManager.NameNotFoundException e) {
              Log.i(IMapView.LOGTAG,"Key %s not found in manifest" +aKey);
          }
          return "";
      }