title: How to disappear multiple canvas on target lost in Unity Vuforia?
body: <p>I know the below code disappears canvas on tracking lost in Vuforia.
  Under DefaultTrackableEvent.cs,</p>
  
  <pre><code>Canvas[] canvasComponents = GetComponentsInChildren&lt;Canvas&gt;(true);
  
          // Disable canvas:
          foreach (Canvas component in canvasComponents)
          {
              component.enabled = false;
          }
  </code></pre>
  
  <p>Now i have 3 canvas and i want 2 canvas elements to disappear on target lost. The above is not working for this! Can you help me with a solution!</p>