docs: public static Bitmap approximateTileFromLowerZoom(
              final MapTileModuleProviderBase pProvider,
              final long pMapTileIndex, final int pZoomDiff) {
          if (pZoomDiff <= 0) {
              return null;
          }
          final int srcZoomLevel = MapTileIndex.getZoom(pMapTileIndex) - pZoomDiff;
          if (srcZoomLevel < pProvider.getMinimumZoomLevel()) {
              return null;
          }
          if (srcZoomLevel > pProvider.getMaximumZoomLevel()) {
              return null;
          }
          final long srcTile = MapTileIndex.getTileIndex(srcZoomLevel,
                  MapTileIndex.getX(pMapTileIndex) >> pZoomDiff,
                  MapTileIndex.getY(pMapTileIndex) >> pZoomDiff);
          try {
              final Drawable srcDrawable = pProvider.getTileLoader().loadTile(srcTile);
              if (!(srcDrawable instanceof BitmapDrawable)) {
                  return null;
              }
              return approximateTileFromLowerZoom((BitmapDrawable) srcDrawable, pMapTileIndex, pZoomDiff);
          } catch (Exception e) {
              return null;
          }
      }