title: (ES6) class (ES2017) async / await getter
body: <p>Is it or will it be possible to have an ES6 class getter
  return a value from an ES2017 await / async function.</p>
  
  <pre><code>class Foo {
      async get bar() {
          var result = await someAsyncOperation();
  
          return result;
      }
  }
  
  function someAsyncOperation() {
      return new Promise(function(resolve) {
          setTimeout(function() {
              resolve('baz');
          }, 1000);
      });
  }
  
  var foo = new Foo();
  
  foo.bar.should.equal('baz');
  </code></pre>