code: function (category) {
                  return _.filter($route.routes, function (route) {
                      return typeof route.category !== 'undefined' && route.category === category && isRouteVisible(route);
                  });
              }
docs: @ngdoc function
  @name w20CoreUI.service:NavigationService#routesFromCategory
  @methodOf w20CoreUI.service:NavigationService
  @param {String} category The category from which to obtain all the available routes
  @returns {Array} A list of the visible routes of the supplied category
  
  @description
  
  Returns the list of all visible routes from a given category name.