// @Filename: meteor.d.ts
        interface User {
            _id: string;
            username?: string;
            emails?: UserEmail[];
            createdAt?: Date;
            profile?: any;
            services?: any;
        }
// @Filename: meteor-astronomy.d.ts
// .... snip ...
interface UserInterface extends Meteor.User {
    address: object;
    firstName: string;
    lastName: string;
    phone: string;
    phoneNumber: string;
    fullName: (param: string) => string;
}

const User = Class.create<UserInterface>({
    name: 'User',
    collection: Meteor.users as unknown as Mongo.Collection<UserInterface>,
    fields: {
        createdAt: Number,
        emails: {
            type: [Object],
            default: (): Meteor.UserEmail[] => [],
        },
        profile: {        // excess property here
            type: UserProfile,
            default: () => {},
        },
        address: {
            type: Object,
            optional: true
        },
        firstName: String,
        lastName: String,
        phone: {
            type: String,
            resolve(doc: UserInterface) {
                return doc.phoneNumber;
            },
        },
        phoneNumber: {
            type: String,
        },
    },
    // ...