code: @Override
      public Asset<?> assetAt(String path) {
          Asset<?> asset = getAssetFromFS(path);
          if (asset == null) {
              asset = getAssetFromBundle(path);
          }
          return asset;
      }
docs: Retrieves an asset.
  
  @param path the asset path
  @return the Asset object, or {@literal null} if the current provider can't serve this asset.