title: Is Eventbus a Mediator or Observer Pattern?
body: <p>Is Eventbus more a Mediator or an Observer? According to Google,
  "eventbus mediator" gets 2.430 hits and
  "eventbus observer" gets 3.850 hits.</p>
  
  <p>From the description, they would both match what I was trying to do (the mediator even a little more).
  So does eventbus implement a specific pattern or is it up to me which I say it is?</p>