pick can be used to create a PickAsserter without specifying a typeName.

Example:

import { _string, Asserted, ObjectAsserter, pick } from "typeguardkit";

// types/user.ts

export const _User = new ObjectAsserter("User", {
  id: _string,
  firstName: _string,
  lastName: _string,
});

export type User = Asserted<typeof _User>;

// types/user_name.ts

export const _UserName = pick(_User, ["firstName", "lastName"]);

export type UserName = Asserted<typeof _UserName>;