Indicates a method is an event consumer. The method must have a single argument and the argument's type determines what type of events should be delivered to the method for consumption. <p/> For example: <pre> @Subscribe public void onSomeEvent(SomeEvent event) { ... } </pre> <p/> Because the method argument is declared as a {@code SomeEvent} type, the method will be called by the event dispatcher whenever a {@code SomeEvent} instance (or one of its subclass instances that is not already registered) is published.