Provides methods to initiate events and synchronize tile entity fields in SMP.
The methods are transparent between singleplayer and multiplayer - if a method is called in singleplayer, the associated callback will be locally executed. The implementation is different between the client and server versions of IC2.
You'll usually want to use the server->client methods defined here to synchronize information which is needed by the clients outside the GUI, such as rendering the block, playing sounds or producing effects. Anything which is only visible inside the GUI should be synchronized through the Container class associated to the GUI in Container.updateProgressBar().