code: function(opts) {
      xml2js.opts = opts;
      return opts
        .option('-i, --inputdir [directory]', 'directory for xml files', __dirname + '/xml/mraa')
        .option('-c, --custom [file]', 'json for customizations')
        .option('-t, --typemaps [directory]', 'directory for custom pointer type maps')
        .option('-g, --imagedir [directory]', 'directory to link to where the images will be kept', '')
        .option('-s, --strict', 'leave out methods/variables if unknown type')
    }
docs: add command line options for this module