Proper JSDoc typedef declaration of function with optional arguments in javascript

Question

Given following typedef

/***
 * @typedef {object} Queue
 * @property {function(string):string[]} listQueueNames Gets an optionally 
   filtered list of QueueNames. 
 */

What is a proper way to mark listQueueName's Argument as an optional Argument ?

Answer 1

Using Closure Compiler syntax should work here:

/***
 * @typedef {object} Queue
 * @property {function(string=):string[]} listQueueNames Gets an optionally 
   filtered list of QueueNames. 
 */