How to use the level-errors.InitializationError function in level-errors

var extend = require('xtend')
var prr = require('prr')
var DeferredLevelDOWN = require('deferred-leveldown')
var IteratorStream = require('level-iterator-stream')
var Batch = require('./batch')
var Codec = require('level-codec')
var getLevelDOWN = require('./leveldown')
var errors = require('level-errors')
var util = require('./util')

var WriteError = errors.WriteError
var ReadError = errors.ReadError
var NotFoundError = errors.NotFoundError
var OpenError = errors.OpenError
var EncodingError = errors.EncodingError
var InitializationError = errors.InitializationError
var LevelUPError = errors.LevelUPError

var getOptions = util.getOptions
var defaultOptions = util.defaultOptions
var dispatchError = util.dispatchError

function getCallback (options, callback) {
  return typeof options === 'function' ? options : callback
}

// Possible LevelUP#_status values:
//  - 'new'     - newly created, not opened or closed
//  - 'opening' - waiting for the database to be opened, post open()
//  - 'open'    - successfully opened the database, available for use
//  - 'closing' - waiting for the database to be closed, post close()
//  - 'closed'  - database has been successfully closed, should not be