pro coding

//problem: setValue(TypeToken, Object) throws ObjectMappingException
super(key, HoconConfigurationLoader.builder().build().createEmptyNode().setValue(TypeToken.of(ItemStack.class), mergeWith))
//solution:
super(key, ((Supplier<ConfigurationNode>) () -> {try {return HoconConfigurationLoader.builder().build().createEmptyNode().setValue(TypeToken.of(ItemStack.class), mergeWith);} catch (ObjectMappingException e) {throw new IllegalArgumentException();}}).get());