title: Get all calendars in Google Apps Scripts CalendarApp class
body: <p>So Google Apps Scripts allow you to <code>getCalendarByID</code>, <code>getCalendarsByName</code> and <code>getDefaultCalendar</code>, which works great when you need to target a specific calendar. However, I was wondering if there's a way for me to get <strong>ALL</strong> the Calendars that is associated with the account?</p>
  
  <p>I've tried <code>getCalendarsByName()</code>, <code>getCalendarsByName('')</code> and <code>getCalendarsByName('*')</code>, none of which works.</p>