title: Flutter: How to handle image with null value?
body: <p>I try simple layout from data.
  It should be just a text and image.
  However, looking at the data it have "image", null or video.</p>
  
  <p>My idea is when image= null, just show a transparent file.
  But how to handle video?</p>
  
  <pre><code>List profileImage = ["picture1.jpg", null  , "picture3.jpg", "profile_video_3.mp4"];
  
                child: Column(
                  children: &lt;Widget&gt;[
                    Text('Stack Oveflow'),
                    Image.asset('assets/quizImages/$FromprofileImage')
                  ],
                ),
  </code></pre>
  
  <p>Expected output is layout have text widget and handle the "image widget" for null value and video file</p>
  
  <p>What is the best practice to handle this?
  Thanks</p>