title: Property 'x' is private and only accessible within class 'y'
body: <p>I have this piece of code:</p>
  
  <pre><code>   import { Component } from '@angular/core';
      import { NavController, Loading, Alert } from 'ionic-angular';
  
      @Component({
        templateUrl: 'build/pages/search/search.html',
      })
  
      export class SearchPage {
      constructor (....)
      {
           // code here
      }
  
      findItems()
      {
              let loading = Loading.create({
                  content: "Finding items..."
              });
  
              this.nav.present(loading);
              // other stuff here
      }
  </code></pre>
  
  <p>When I run <code>ionic serve</code> everything shows correctly but when I click a button which calls <code>findItems()</code> method I get this error:</p>
  
  <pre><code>Error TS2341: Property 'create' is private and only accessible within class 'Loading
  </code></pre>
  
  <p>An analogous errors appears if I do:</p>
  
  <pre><code>let alert = Alert.create({
                      title: 'Hello!',
                  });
  </code></pre>
  
  <p>In this case in my terminal appears following message:<code>Error TS2341: Property 'create' is private and only accessible within class 'Alert'.</code></p>
  
  <p>I'm working with Ionic2 version 2.0.0-beta.36</p>