How to use the superstring.TextBuffer function in superstring

const {Emitter, CompositeDisposable} = require('event-kit')
const {File} = require('pathwatcher')
const diff = require('diff')
const _ = require('underscore-plus')
const path = require('path')
const crypto = require('crypto')
const mkdirp = require('mkdirp')
const superstring = require('superstring')
const NativeTextBuffer = superstring.TextBuffer
const Point = require('./point')
const Range = require('./range')
const DefaultHistoryProvider = require('./default-history-provider')
const NullLanguageMode = require('./null-language-mode')
const Marker = require('./marker')
const MarkerLayer = require('./marker-layer')
const DisplayLayer = require('./display-layer')
const {spliceArray, newlineRegex, patchFromChanges, normalizePatchChanges, extentForText, debounce} = require('./helpers')
const {traverse, traversal} = require('./point-helpers')
const Grim = require('grim')

// Extended: A mutable text container with undo/redo support and the ability to
// annotate logical regions in the text.
//
// ## Observing Changes
//