code: function resolvePrefixAndFile (nonAbsoluteFilePath, prefix) {
    // prefix is not absolute
    if (path.parse(prefix).root === '') {
      return path.resolve(process.cwd(), prefix, nonAbsoluteFilePath)
    }
  
    // prefix is absolute
    return path.resolve(prefix, nonAbsoluteFilePath)
  }
docs: Append the prefix to the current working directory,
  or use it as an absolute path
  
  @param   {String} nonAbsoluteFilePath
  @param   {String} prefix
  
  @private
  @returns {String} resolvedPath