@silverbirder/rminc/dist/user/mail/iMailApp.d.ts

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

import IMailThread from "./iMailThread";
import ILabel from "./iLabel";
export default interface IMailApp {
    search(q: string): Array<IMailThread>;
    getUserLabelByName(name: string): ILabel;
    createLabel(name: string): void;
}