code: private BrowserUsageData getOperaUsageData() {
      BrowserUsageData data = new BrowserUsageData();
      data
          .setBrowserName("Opera");
      data
          .setMarketShare(2.14f);
      ColorReference operaColor = new HighchartsColor(4);
      data
          .setColor(operaColor);
      data
          .getVersionUsageData()
          .add(
              new VersionUsageData("Opera 9.x", 0.12f, operaColor
                  .brighten(0.1f)));
      data
          .getVersionUsageData()
          .add(
              new VersionUsageData("Opera 10.x", 0.37f, operaColor
                  .brighten(0.2f)));
      data
          .getVersionUsageData()
          .add(
              new VersionUsageData("Opera 11.x", 1.65f, operaColor
                  .brighten(0.3f)));
      return data;
    }
docs: Creates the Opera data.