在特定时间段从多个日历中提取事件

Question

如何编辑以下代码，以便能够在同一电子表格中提取多个Google日历？我似乎无法弄清楚如何包含多个日历。我也不想覆盖任何人的日历事件。它们都应该填充在同一张纸中。

function export_gcal_to_gsheet_alex(){

    var mycal = "alex@testtest.com" ;
    var cal = CalendarApp.getCalendarById(mycal);

    var events = cal.getEvents(new Date("December 2, 2018 00:00:00 CST"), new Date("December 10, 2018 23:59:59 CST"), {search: '-project123'});

    var sheet = SpreadsheetApp.getActiveSheet();

    var header = [["Calendar Address", "Event Title", "Event Description", "Event Location", "Event Start", "Event End", "Calculated Duration", "Visibility", "Date Created", "Last Updated", "MyStatus", "Created By", "All Day Event", "Recurring Event"]]
    var range = sheet.getRange(1,1,1,14);
    range.setValues(header);


    for (var i=0;i<events.length;i++) {
        var row=i+2;
        var myformula_placeholder = '';

        var details=[[mycal,events[i].getTitle(), events[i].getDescription(), events[i].getLocation(), events[i].getStartTime(), events[i].getEndTime(), myformula_placeholder, ('' + events[i].getVisibility()), events[i].getDateCreated(), events[i].getLastUpdated(), events[i].getMyStatus(), events[i].getCreators(), events[i].isAllDayEvent(), events[i].isRecurringEvent()]];
        var range=sheet.getRange(row,1,1,14);
        range.setValues(details);

        var cell=sheet.getRange(row,7);
        cell.setFormula('=(HOUR(F' +row+ ')+(MINUTE(F' +row+ ')/60))-(HOUR(E' +row+ ')+(MINUTE(E' +row+ ')/60))');
        cell.setNumberFormat('.00');

    }
}