title: Observable.zip is not a function
body: <blockquote>
    <p>VM95422:27 ORIGINAL EXCEPTION:
    <strong>WEBPACK_IMPORTED_MODULE_3_rxjs_Observable</strong>.Observable.zip is not a function</p>
  </blockquote>
  
  <p>Tried various imports</p>
  
  <pre><code>// import 'rxjs/add/operator/zip';
  // import 'rxjs/add/observable/zip-static';
  // import 'rxjs/add/operator/zip';
  import 'rxjs/operator/zip';
  </code></pre>
  
  <p>Trying to use it like that:</p>
  
  <pre><code>const zippedUsers: Observable&lt;User[]&gt; = Observable.zip&lt;User&gt;(this.usersObservable);
  </code></pre>
  
  <p>Angular 4, TypeScript 2.1.6</p>
  
  <p>package.json:</p>
  
  <pre><code>"rxjs": "^5.1.0",
  </code></pre>