angular
    .module('selectDemoOptGroups', ['ngMaterial'])
    .controller('SelectOptGroupController', function($scope) {
      $scope.sizes = [
          "small (12-inch)",
          "medium (14-inch)",
          "large (16-inch)",
          "insane (42-inch)"
      ];
      $scope.toppings = [
        { category: 'meat', name: 'Pepperoni' },
        { category: 'meat', name: 'Sausage' },
        { category: 'meat', name: 'Ground Beef' },
        { category: 'meat', name: 'Bacon' },
        { category: 'veg', name: 'Mushrooms' },
        { category: 'veg', name: 'Onion' },
        { category: 'veg', name: 'Green Pepper' },
        { category: 'veg', name: 'Green Olives' }
      ];
    });
