code: 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;
      }
docs: Approximate a tile from a lower zoom level
  
  @since 6.0.0
  @param pMapTileIndex Destination tile, for the same place on the planet as the source, but on a higher zoom
  @param pZoomDiff Zoom level difference between the destination and the source; strictly positive
  @return