Docs - I am able to add new add new items to top level scope, contrary to what doc mention.

[zzxoto]

Search Terms: Documentation

Typescript Version: 3.5.3

Documentation here and here mention, "Neither module augmentations nor global augmentations can add new items to the top level scope - they can only “patch” existing declarations.", however I am able to "add new items".

//file-a.ts
import * as moment from 'moment';
declare module "moment" {
  interface GoblyGoop {
      name: string;
  }
}
let y: moment.GoblyGoop;

//file-b.ts
import * as moment from 'moment';
let y: moment.GoblyGoop;