var falcorExpress = require( 'falcor-express' );var falcor = require('falcor');var express = require( 'express' );var app = express();var $ref = falcor.Model.ref;var model = new falcor.Model({    cache: {        titleById: {            5221: {                name: "House of Cards",                rating: {$type: "atom", value: 5},                bookmark: {$type: "error", value: "Something went wrong."}            }        },        genreList: [            {                name: 'Recently Watched',                titles: [                    $ref("titleById[5221]")                ]            },            {                name: "New Releases",                titles: [                    $ref("titleById[5221]")                ]            }        ]    }});app.use(express.static(__dirname + '/'));app.use( '/model.json', falcorExpress.dataSourceRoute( function ( req, res ) {    return model.asDataSource();} ) );var server = app.listen(3131);