How to use the cwrc-public-entity-dialogs.showCreateNewButton function in cwrc-public-entity-dialogs

document.addEventListener('DOMContentLoaded', function() {

    let viaf = require('viaf-entity-lookup')
    let dbpedia = require('dbpedia-entity-lookup');
    let wikidata = require('wikidata-entity-lookup');
    let getty = require('getty-entity-lookup');
    let geonames = require('geonames-entity-lookup');
    let CWRCWriterDialogs = require('cwrc-public-entity-dialogs');

    CWRCWriterDialogs.showNoLinkButton(true);
    CWRCWriterDialogs.showCreateNewButton(false);
    CWRCWriterDialogs.showEditButton(false);
    CWRCWriterDialogs.registerEntitySources({
        person: (new Map()).set('viaf', viaf).set('wikidata', wikidata).set('getty', getty).set('dbpedia', dbpedia),
        place: (new Map()).set('geonames', geonames).set('viaf', viaf).set('dbpedia', dbpedia).set('wikidata', wikidata),
        organization: (new Map()).set('viaf', viaf).set('wikidata', wikidata).set('dbpedia', dbpedia),
        title: (new Map()).set('viaf', viaf).set('wikidata', wikidata).set('dbpedia', dbpedia)
    })
    // window.CWRCWriterStorageDialogs = require('./storage-dialogs.js');
    let CWRCWriterStorageDialogs = require('cwrc-git-dialogs')['default'];
    let config = require('./config.js');
    config.container = 'cwrcWriterContainer';
    config.modules = {
        west: [ 'structure', 'entities', 'nerve' ],
        south: [ 'selection', 'validation' ],
        east: [ 'imageViewer' ]
    };