title: Why I can't use this class Platform in Flutter even though it's installed
body: <p>This error got me confusing since I can't use the class Platform but I have already added its library dart.io (and even upgraded the pubspec file). The strange thing is that the class appears :
  <a href="https://i.stack.imgur.com/YoGOU.png" rel="nofollow noreferrer">enter image description here</a></p>
  <p>but when Im using it, it throws an error
  <a href="https://i.stack.imgur.com/cumum.png" rel="nofollow noreferrer">enter image description here</a></p>
  <p>any idea if it is a flutter bug?</p>