Calling stored procedures in Sequelize.js

I have searched documentation and tried google that, but I did not find a straight answer to the question:

How can I call a stored procedure in Sequelize?

I have searched the documentation of Sequelize but I have even not found a trace of the word "procedure" in that.

The closest I got was this bug-report-turned-feature-request: https://github.com/sequelize/sequelize/issues/959

Quoting from the link:

What I imagine would be awesome:

sequelize.query('CALL calculateFees();').success(
    function (settingName1, settingName2, settingName3, users) {
});

They mention that it is possible to call stored procedures, but the syntax is not provided.

Can anyone give me an example with the proper syntax?

Thanks.