loadMetaText = (targetName, _log = defaultLog) =>
    wr
      .readOnly()
      .neighbor(toBundleMeta(targetName))
      .maybeReadText()
      .catch(
        ioError =>
          Fail`${targetName}: cannot read bundle metadata: ${q(ioError)}`,
      )
@param {string} targetName
@param {Logger} _log
@returns {Promise<string | undefined>}