override fun registerBlockComponentFactories(registry: BlockComponentFactoryRegistry) {
    registry.beginRegistration(BaseContainerBlockEntity::class.java, MANUFACTORY_ENVIRONMENT)
        .filter { cl -> Container::class.java.isAssignableFrom(cl) }
        .end { blockEntity ->
            if(blockEntity is Container) {
                println("Adding environment to: ${ blockEntity::class }")
                BlockEntityInventoryEnvironment(blockEntity)
            }
            else
                throw IllegalArgumentException("Expected Container BlockEntity!")
        }
}

interface InventoryEnvironment: ComponentV3, ClientTickingComponent, ServerTickingComponent {
    val size: Int

    fun getItem(index: Int): ItemStack

    fun setItem(index: Int, stack: ItemStack)
}