docs: function istanbulCoberturaBadger(opts, callback) {
    // Resolve the options
    opts = extend({
      // Setting the default coverage file generated by istanbul cobertura report.
      istanbulReportFile: "./coverage/cobertura-coverage.xml",
      // The default location for the destination being the coverage directory from istanbul.
      destinationDir: null,
      // The shields host to be used for retrieving the badge. https://github.com/badges/shields
      shieldsHost: process.env.SHIELDS_HOST || "https://img.shields.io",
      // The style of shield icon to generate (plastic, flat-square, flat)
      shieldStyle: "flat",
      // The name of the badge file to be generated
      badgeFileName: "coverage",
      // The thresholds to be used to give colors to the badge.
      thresholds: defaultThresholds
    }, opts);
  
    opts.badgeFormat = opts.badgeFormat || "svg";
  
    reportParser(opts.istanbulReportFile, function(err, report) {
      if (err) {
        return callback(err);
      }
  
      // The color depends on the fixed thresholds (RED: 0 >= % < 60) (YELLOW: 60 >= % < 90) (GREEN: % >= 90)
      var color = report.overallPercent >= opts.thresholds.excellent ? "brightgreen" :
        (report.overallPercent >= opts.thresholds.good ? "yellow" : "red");
  
      // The shields service that will give badges.
      var url = opts.shieldsHost + "/badge/coverage-" + report.overallPercent;
      url += "%25-" + color + "." + opts.badgeFormat + "?style=" + opts.shieldStyle;
  
      // Save always as coverage image.
      var badgeFileName = path.join(opts.destinationDir, opts.badgeFileName + "." + opts.badgeFormat);
  
      downloader(url, badgeFileName, function(err, downloadResult) {
        if (err) {
          return callback(err);
        }
  
        report.url = url;
        report.badgeFile = downloadResult;
        report.color = color;
  
        return callback(null, report);
      });
    });
  }