[1.12] how do you check if a mod is loaded?

@EventHandler
public static void PostInit(FMLPostInitializationEvent event) {
	simpleRPGLoaded = Loader.isModLoaded("simplerpg");
	info(simpleRPGLoaded ?
			"SimpleRPG's player level will be used as Object Control Authority. This can be disabled in config.":
			"SimpleRPG is not loaded. Minecraft's player level will be used instead.");
}

EntityPlayerMP p = (EntityPlayerMP)(entity);
int level;
if (ObjectPriorities.simpleRPGLoaded && ConfigFile.general.useSimpleRPG) {
	try {
		IRpgPlayer rpg = (IRpgPlayer) p.getCapability(RpgPlayerProvider.RPG_PLAYER_CAP, (EnumFacing) null);
		level = rpg.getLevel();
	} catch (Error e) {}
} else {
	level = p.experienceLevel;
}