www/index.js
function(url, headers, cb) {
        var callback = (typeof headers == "function" ? headers : cb);
        exec(callback, callback, 'Sync', 'download', [url, null, headers]);
    }
function(url, headers, cb) {
        var callback = (typeof headers == "function" ? headers : cb);
        exec(callback, callback, 'Sync', 'download', [url, null, headers]);
    }
Download

This call is to replicate nothing but might be used instead of FileTransfer