What is meant by Method chaining?

Method chaining is a programming technique that is supported by many hibernate interfaces. This is less readable when compared to actual java code. And it is not mandatory to use this format. Look how a SessionFactory is created when we use method chaining.

 SessionFactory sessions = new Configuration()
     .addResource("myinstance/MyConfig.hbm.xml")
     .setProperties( System.getProperties() )
     .buildSessionFactory();