API Name: global.BusinessCalendarUtil

var BusinessCalendarUtil = Class.create();
BusinessCalendarUtil.prototype = {
initialize: function() {
},

getAvailableCalendars: function() {
var gr = new GlideRecord("business_calendar");
gr.addQuery("is_legacy_schedule", false);
gr.query();

while (gr.next()) {
answer.add(gr.calendar_name, gr.label);
}
},

type: 'BusinessCalendarUtil'
};