How to use the @angular/cli/ember-cli/lib/models/blueprint.ignoredFiles function in @angular/cli

var glob = require('glob');
var Blueprint = require('@angular/cli/ember-cli/lib/models/blueprint');
var path = require('path');
var tmp = require('../helpers/tmp');
var root = path.join(__dirname, '../../packages/@angular/cli');
var util = require('util');
var minimatch = require('minimatch');
var intersect = require('lodash/intersection');
var remove = require('lodash/remove');
var unique = require('lodash/uniq');
var forEach = require('lodash/forEach');
var any = require('lodash/some');
var EOL = require('os').EOL;
var existsSync = require('exists-sync');

var defaultIgnoredFiles = Blueprint.ignoredFiles;

describe('Acceptance: ng update', function () {
  this.timeout(20000);

  beforeEach(function () {
    // Make a copy of defaultIgnoredFiles.
    Blueprint.ignoredFiles = defaultIgnoredFiles.splice(0);

    return tmp.setup('./tmp').then(function () {
      process.chdir('./tmp');
    });
  });

  afterEach(function () {
    return tmp.teardown('./tmp');
  });

remove(array, function (fn) {
      return any(Blueprint.ignoredFiles, function (ignoredFile) {
        return minimatch(fn, ignoredFile, { matchBase: true });
      });
    });
  }