docs: function lookForBinary(binary, pathList) {
    let envPath = _.toArrayIfNeeded(pathList);
    if (_.isEmpty(envPath)) {
      envPath = (process.env.PATH || '').split(path.delimiter);
    }
    const foundPath = _.first(_.filter(envPath, (dir) => {
      return fileExists(path.join(dir, binary));
    }));
    return foundPath ? path.join(foundPath, binary) : null;
  }