title: Is there a concept of event in Swift similar to events in C#?
body: <p>I'm getting into Swift from Java\C# background and can't figure out one thing. 
  Is there any way to create a notification events in Swift objects similar to Events (<code>Action&lt;T&gt;</code>) in C#?</p>
  
  <p>Or am I suppose to use closures for this purpose?</p>