How to use the interface-datastore.Errors function in interface-datastore

const path = require('path')

const filter = require('interface-datastore').utils.filter
const take = require('interface-datastore').utils.take
const map = require('interface-datastore').utils.map
const sortAll = require('interface-datastore').utils.sortAll
const IDatastore = require('interface-datastore')

const noop = () => {}
const asyncMkdirp = promisify(require('mkdirp'))
const fsAccess = promisify(fs.access || noop)
const fsReadFile = promisify(fs.readFile || noop)
const fsUnlink = promisify(fs.unlink || noop)

const Key = IDatastore.Key
const Errors = IDatastore.Errors

async function writeFile (path, contents) {
  try {
    await writeAtomic(path, contents)
  } catch (err) {
    if (err.code === 'EPERM' && err.syscall === 'rename') {
      // fast-write-atomic writes a file to a temp location before renaming it.
      // On Windows, if the final file already exists this error is thrown.
      // No such error is thrown on Linux/Mac
      // Make sure we can read & write to this file
      await fsAccess(path, fs.constants.F_OK | fs.constants.W_OK)

      // The file was created by another context - this means there were
      // attempts to write the same block by two different function calls
      return
    }