title: Using -> on a static object
body: <p>While reading this: <a href="http://propelorm.org/" rel="nofollow">http://propelorm.org/</a> I noticed that they are using -> sign on a static object and using several different methods of it as a "one-liner".</p>
  
  <p>Or does the static object return an instance which from the methods are being called from?</p>
  
  <p>What ever is the case I would like to read more about this. What is this called and does it really work with static objects?</p>