title: How to undo bypassSecurityTrustHtml, i.e convert SafeValue back to string
body: <p>I am generating html, and inserting it into my web page using </p>
  
  <pre><code>let data = '&lt;font color=blue&gt;hello world&lt;/font&gt;';
  this.safevalue = this.domSanitizer.bypassSecurityTrustHtml(data);
  </code></pre>
  
  <p>Elsewhere in my code I want to convert the safe value back into a string, so I tried this...</p>
  
  <pre><code>data = this.safevalue.toString();
  </code></pre>
  
  <p>but this sets data to a string like this...</p>
  
  <pre><code>'SafeValue must use [property]=binding: (see http://g.co/ng/security#xss)'
  </code></pre>
  
  <p>which is not helpful</p>