title: How to loop/map json object in Dart
body: <p>I have json object like this: </p>
  
  <pre><code>apus_findgo_gallery_images: {
  2092: "http://www.camhalalguide.com/wp-content/uploads/2019/11/6b806c88-2f19-4054-914b-dee3c0c091eb.jpg",
  2093: "http://www.camhalalguide.com/wp-content/uploads/2019/11/24.1.1-phnom-chisor-temple.jpg",
  2096: "http://www.camhalalguide.com/wp-content/uploads/2019/11/image-asset.jpg",
  2098: "http://www.camhalalguide.com/wp-content/uploads/2019/11/phnom-chisor-01-600_orig.jpg",
  2099: "http://www.camhalalguide.com/wp-content/uploads/2019/11/phnom-chisor-02-600_orig.jpg"
  },
  </code></pre>
  
  <p><strong>How to get property value as array like this:</strong> </p>
  
  <pre><code>[
  "http://www.camhalalguide.com/wp-content/uploads/2019/11/6b806c88-2f19-4054-914b-dee3c0c091eb.jpg",
  "http://www.camhalalguide.com/wp-content/uploads/2019/11/image-asset.jpg",
  "http://www.camhalalguide.com/wp-content/uploads/2019/11/phnom-chisor-01-600_orig.jpg",
  "http://www.camhalalguide.com/wp-content/uploads/2019/11/phnom-chisor-02-600_orig.jpg"
  ]
  </code></pre>