code: function cssTemplate (params) {
    // Localize parameters
    var items = params.items;
    var options = params.options;
    var tmplParams = {
      sprite: null,
      retina: null,
      items: [],
      options: options
    };
  
    var classFn = function (name, sep) {
      if (options.cssClass) {
        return '.' + cssesc(options.cssClass + sep + name, {isIdentifier: true});
      }
      else {
        return '.icon' + cssesc(sep + name, {isIdentifier: true});
      }
    };
  
    // Add class to each of the options
    items.forEach(function saveClass (item) {
      if (item.type === 'sprite') {
        item['class'] = classFn('', '');
        tmplParams.sprite = item;
      }
      else if (item.type === 'retina') {
        item['class'] = classFn('', '');
        tmplParams.retina = item;
      }
      else {
        item['class'] = classFn(item.name, '-');
        tmplParams.items.push(item);
      }
    });
    // Render and return CSS
    var tmplFile = options.template ?
      fs.readFileSync(path.resolve(process.cwd(), options.template), 'utf8') :
      tmpl[options.processor];
    var css = mustache.render(tmplFile, tmplParams);
    return css;
  }
docs: Define our css template fn ({items, options}) -> css