title: webstorm: what does "Element is not exported" warning mean?
body: <p>if i write such code in webstorm </p>
  
  <pre><code>export class someOne {
    constructor(param) {
      this.test = param;
    }
  
    useTest(){
      return this.test;
    }
  }
  
  
  console.log(new someOne(123).useTest());
  </code></pre>
  
  <p>and mouseover on "this.test" i see the warning: "Element is not exported"</p>
  
  <p><a href="https://i.stack.imgur.com/UPh9s.png"><img src="https://i.stack.imgur.com/UPh9s.png" alt="element is not exported wtf"></a></p>
  
  <p>what does it mean?
  if i change the <code>.test</code> to <code>.test1</code> the warning disappears</p>