code: function filter() {
    var ret = [];
    var labels = Array.prototype.slice.call(arguments);
  
    labels.forEach(function(label) {
      browsers.forEach(function(browser) {
        if (label === 'bs_all') {
          ret.push(browser);
        } else if (browser._alias.match(new RegExp(label.slice(2) + '$'))) {
          ret.push(browser);
        }
      });
    });
  
    return ret;
  }
docs: Returns an array of Objects that match the requested filters.
  If no arguments are provided, an empty array is returned.
  
  E.g.
  
  filter('bs_latest') - Will return the latest browser Objects for each browser.
  filter('bs_latest', 'bs_previous') - Will return the latest and previous browser Objects for each browser.
  filter('bs_ie_latest', 'bs_oldest') - Will return the latest IE browser and all of the oldest browsers.
  filter('bs_all') - Will return the all of the browser Objects.
  
  @returns {Array}