title: Safe dereferencing a dynamic property in dart
body: <p>In dart, we can safe dereference a property like this:</p>
  
  <p><code>myObj?.property</code></p>
  
  <p>But when I try to do it for a dynamic property like:</p>
  
  <p><code>myObj?.['property']</code></p>
  
  <p>This gives syntax error.</p>
  
  <p>So is this even possible in dart?</p>