zendframework/zf2 — pull request #5471 by Thinkscape (2013-11-13 13:54:19+00:00)
Title: Fix typehint for getServiceLocator().

It's always `ServiceLocatorInterface` because:

* getServiceLocator() returns the contents of $this->serviceLocator
* which is set by setServiceLocator(ServiceLocatorInterface $sl).
* setter has a specific type hint