title: rxjs/operators: can not find module
body: <p>I import rxjs/operators like this: </p>
  
  <p><code>import { map } from 'rxjs/operators';</code></p>
  
  <p>But that gives me the following error:</p>
  
  <blockquote>
    <p><strong>map</strong> is declared but it values is never read. Cannot find module rxjs/operators</p>
  </blockquote>
  
  <p>in Angular.</p>
  
  <p>Please help.</p>