public class ApplicationClassloaderState
extends java.lang.Object
Each unique instance of this class represent a State of the ApplicationClassloader.
When some classes is reloaded, them the ApplicationClassloader get a new state.
This makes it easy for other parts of Play to cache stuff based on the
the current State of the ApplicationClassloader..
They can store the reference to the current state, then later, before reading from cache,
they could check if the state of the ApplicationClassloader has changed..