var objects = json_parse.objects;
var group = new fabric.Group([]);
for (var i = 0; i < objects.length; i++) {
        var klass = fabric.util.getKlass(objects[i].type);
        if (klass.async) {
            klass.fromObject(objects[i], function (img) {
                group.addWithUpdate(img);
            });

        } else {
            var obj = klass.fromObject(objects[i]);
            group.addWithUpdate(obj);

        }
    }