docs: public Bitmap approximateTileFromLowerZoom(final long pMapTileIndex, final int pZoomDiff) {
          for (final MapTileModuleProviderBase provider : mProviders) {
              final Bitmap bitmap = approximateTileFromLowerZoom(provider, pMapTileIndex, pZoomDiff);
              if (bitmap != null) {
                  return bitmap;
              }
          }
          return null;
      }