I think I'm doing it the way it's explained in jsdoc3 documentation. My WebStorm is version 8.0.4
/**
* This callback type is called `dbOpenCallback` and is displayed as a global symbol.
*
* @callback dbOpenCallback
* @param {object} err
* @param {DbWrapper} result
*/
/**
* Open mongodb connection
* @param {dbOpenCallback} cb - The callback that executes after connection is established.
*/