title: How to Set Route params imperatively in named outlets in Angular 2
body: <p>To set imperatively a route param in a <code>router-outler</code> we do:</p>
  
  <pre><code>this.router.navigate(['/hero', hero.id]);
  </code></pre>
  
  <p>How do I imperatively set a route parameter in named outlets ? </p>
  
  <pre><code>this.router.navigate([{ outlets:{modal: 'modal/user'} }]);
  </code></pre>
  
  <p>Right now I concatenate string to set a route param: </p>
  
  <pre><code>this.router.navigate([{ outlets: {modal: 'modal/user' + '/' + 'this.id'} }]);
  </code></pre>