override def registerRecipe(): Unit =
    {
        val redstoneStack = new ItemStack(Items.redstone)
        val redstoneBlockStack = new ItemStack(Blocks.redstone_block)
        val woodStack = new ItemStack(Blocks.planks)

        GameRegistry.addShapedRecipe(new ItemStack(BasicPowerBank.getItem),
        "rrr",
        "RwR",
        "rrr",
            Character.valueOf('r'), redstoneStack,
            Character.valueOf('R'), redstoneBlockStack,
            Character.valueOf('w'), "plankWood") // This crashes Minecraft (NullPointerException) when I use the "plankWood" or ":plankWood" construction for an OreDict entry, but not when I use the ItemStack definition as above.
    }