text: var Component = Exact.Component;
  
  var App = Exact.defineClass({
    extend: Component,
    statics: {
      descriptors: ['what'], // or {what: null}, so `what` is bindable
      template: '<div><h1 style="color: #0066dd;">Hello, @{ $.what }!</h1></div>'
    }
  });
  
  var app = Component.create(App, {what: 'Exact'});
  
  app.attach(Exact.Skin.query('#app'));
  
  console.log('do something like:');
  console.log('app.what = "Earth";');
  console.log('app.set("what", "Universe");');
  console.log('app.save({what: "Everything"});');