createAssetCardFor_(asset, container) {
    const isFeatured = true;
    return new shakaDemo.AssetCard(container, asset, isFeatured, (c) => {
      const unsupportedReason = shakaDemoMain.getAssetUnsupportedReason(
          asset, /* needOffline= */ false);
      if (unsupportedReason) {
        c.markAsUnsupported(unsupportedReason);
      } else {
        c.addBaseButtons();
        c.addStoreButton();
      }
    });
  }
@param {!ShakaDemoAssetInfo} asset
@param {!Element} container
@return {!shakaDemo.AssetCard}
@private