docs: function lintStyles(conf, undertaker) {
  
    const sassSrc = path.join(conf.themeConfig.root, conf.themeConfig.sass.src, '**', '*.scss');
  
    let stylelintConf = {
      config: require('./stylelint.config'),
      reporters: [{
        formatter: 'string',
        console: true
      }],
      failAfterError: conf.productionMode
    };
  
    // If there are any stylelint overrides, then apply them now.
    if (conf.themeConfig.sass.hasOwnProperty('stylelint')) {
      stylelintConf = merge(stylelintConf, conf.themeConfig.sass.stylelint);
    }
  
    return undertaker.src(sassSrc)
      .pipe(stylelint(stylelintConf));
  
  }