@silverbirder/rminc/dist/user/calendarApp/iCalendarApp.d.ts

rMinc is the Google Apps Script Library that register Mail in Calendar

import ICalendar from "../calendar/iCalendar";
export default interface ICalendarApp {
    getCalendarByName(name: string): ICalendar;
    createCalendar(name: string): ICalendar;
}