code: function parse (input, opts) {
    // Wrap parser.parse to allow specifying the start rule
    // as a shorthand option
    if (!opts) {
      opts = {}
    }
    else if (typeof opts == 'string') {
      opts = { startRule: opts }
    }
    return parser.parse(input, opts)
  }
docs: This isn't called directly, but stringified into the resulting source