title: Observable.of is not a function
body: <p>I am having issue with importing <code>Observable.of</code> function in my project. My Intellij sees everything. In my code I have:</p>
  
  <pre><code>import {Observable} from 'rxjs/Observable';
  </code></pre>
  
  <p>and in my code I use it like that:</p>
  
  <pre><code>return Observable.of(res);
  </code></pre>
  
  <p>Any ideas?</p>