remote

Gets or sets the remote data retrieval settings for the DataSource. If the initialization options specify remote data settings, this property contains the initial remote settings object.

var dataSource = new shield.DataSource({
    remote: {
        read: {
            url: "/content/xml/movies.xml"
        }
    }
});

console.log(dataSource.remote);   //remote is the above object
//redefine parts of the remote settings
dataSource.remote.read.dataType = "json";