title: Map json from server answer in flutter app
body: <p>I have a webserver, that always returns a String in this json format:</p>
  <p><code>{&quot;status&quot;:100,&quot;content&quot;:[{&quot;version&quot;:&quot;2.2.2&quot;}]}</code></p>
  <p>I want my flutter app to map this json to a Map&lt;String, dynamic&gt;` everytime on appstart to check if a new version is available.</p>
  <p>To reduce server load, I don't want to use a websocket for this.</p>
  <p>Since I am completely unexperienced with darts web i/o, I would appreciate some advice on where to start with this. I am lacking imagination and knowledge on what is needed for this usecase.</p>