Trying to get the Batch example to work

[markdorrill]

I'm trying to get the example in htmlToJson.batch to work but dont understand what the getProlificHomepage() function should look like or return.

Currently I'm trying the following request. It returns html but not a promise that the batch chain can operate on.

var getProlificHomepage = htmlToJson.request('http://prolificinteractive.com', {
        'text': function ($doc) {
            return $doc.text();
        }
    }, function (err, result) {
        console.log(result);
    });