title: Add text/content on rectangle HERE maps
body: <p>I want to add some text on the rectangle on here maps. I`ve already tried this:</p>
  <pre><code>    var obj = new H.map.Rect(boundingBox, {
      style: {
          fillColor: 'rgba(0,0,0,0.2)',
          strokeColor: 'rgba(0,0,0,1)',
          lineWidth: 3,
          content: 'fsd'
      },
  });
  </code></pre>
  <p>but 'content' property in this case does nothing. Is it possible to add text or content on rectangle in HERE maps?</p>