title: Retrieve the name of variable associated with TemplateRef
body: <p>Say I have this template:</p>
  
  <pre><code>&lt;div class="main__container"&gt;
      &lt;ng-template #test&gt;&lt;/ng-template&gt;
      &lt;ng-template #test2&gt;&lt;/ng-template&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>And I retrieve a reference to all <code>TemplateRef</code> via:</p>
  
  <pre><code>@ViewChildren(TemplateRef)
  private templates;
  </code></pre>
  
  <p>How can I, for all of them, retrieve the name of the associated variable? So "test" for the first template and "test2" for the other one. I don't absolutely want to use variables, if it's possible by using an attribute of <code>ng-template</code>, it's OK. I tried with <code>TemplateRef</code>, <code>ViewContainerRef</code> and <code>ElementRef</code> but everytime, it returns a reference to a <code>comment</code> element.</p>