How to use the consolidate.dust function in consolidate

'fn': function (deferred) {
            consolidate.dust(path.join(__dirname, 'views/includes/common-dust.html'), data, function (err, html) {
                if (err) {
                    throw err;
                }
                deferred.resolve();
            });
        }
    });

'fn': function (deferred) {
            consolidate.dust(path.join(__dirname, 'views/includes/dust.html'), getData(), function (err, html) {
                if (err) {
                    throw err;
                }
                deferred.resolve();
            });
        }
    });