KDeferredRegister & Datagenerators - lateinit property was not initialized about kotlinforforge HOT 3 CLOSED

object ModBlocks {
    val REGISTRY = KDeferredRegister(ForgeRegistries.BLOCKS, LightsOnMod.ID)

    val BULB = register("bulb") {
        BulbBlock(AbstractBlock.Properties.create(Material.ROCK).setLightLevel { 15 }.hardnessAndResistance(3.0f))
    }

    private fun <T : Block> register(name: String, block: () -> T): BlockReg<T> {
        val ret: ObjectHolderDelegate<T> = REGISTRY.register(name, block) as ObjectHolderDelegate<T>
        ModItems.REGISTRY.register(name) {
            BlockItem(ret.get(), Item.Properties().group(ItemGroup.BUILDING_BLOCKS))
        }
        return BlockReg(name, ret)
    }
}

data class BlockReg<T : Block>(val name: String, val obj: ObjectHolderDelegate<T>)

        ModBlocks.REGISTRY.register(MOD_BUS)