code: function resolveNewPath(newBase) {
      return mapSync(file => {
        file.cwd += newBase;
        file.base = file.cwd;
        return file;
      });
    }
docs: "Fix" file path for the babel task to get better-looking module names.
  
  @param {string} newBase The base directory against which the file path
  should be matched.
  @return {Stream<File>} Stream processor for files.