flow-is-dumb.js

  const getFileInfoText = () => {
    if (!versionInfo || !versionInfo.created || !versionInfo.filesize) {
      return null;
    }
    return (
      <div className="AddonVersionCard-fileInfo">
        {i18n.sprintf(
          i18n.gettext('Released %(dateReleased)s - %(fileSize)s'),
          {
            dateReleased: i18n.moment(versionInfo.created).format('ll'),
            fileSize: versionInfo.filesize,
          },
        )}
      </div>
    );
  };