class Async

An asynchronous responder owns the underlying transaction.

It may be stored in the server implementation for delayed reply. It is okay for the handler

to return without replying when the Completer::Sync is converted to Completer::Async, e.g.

virtual void MyMethod(Foo foo, Bar bar, MyMethodCompleter::Sync

&

completer) {

PerformLongOperation(foo, bar).then([completer = completer.ToAsync()] () {

// Here the type of |completer| is |MyMethodCompleter::Async|.

completer.Reply(...);

});

}