registerAssociatedId

	//ID指定だけ。被ってたら被らなくなるまで増加方向にずれる。
	private void registerItemToId(Item item, String name, String modId, int Id)
	{
	  //これに悩んでたってわけ。
		Map<UniqueIdentifier, ModContainer> customOwners = ObfuscationReflectionHelper.getPrivateValue(GameData.class, null, 3);
        ModContainer mc = Loader.instance().activeModContainer();
        if (modId != null)
        {
            //地味にここも悩んだ。
            customOwners.put(new UniqueIdentifier(modId + ":" +name), mc);
        }
        if (item instanceof ItemBlock)
        {
            throw new RuntimeException("Cannot register an itemblock separately from it's block");
        }
        int itemId = GameData.itemRegistry.add(Id, name, item);
        GameData.blockRegistry.useSlot(itemId);
	}
	  //Itemと殆ど同じ。
		private void registerBlockToId(Block block, String name, String modId, int Id)
	{
		Map<UniqueIdentifier, ModContainer> customOwners = ObfuscationReflectionHelper.getPrivateValue(GameData.class, null, 3);
        ModContainer mc = Loader.instance().activeModContainer();
        if (modId != null)
        {
            customOwners.put(new UniqueIdentifier(modId + ":" + name), mc);
        }
        int blockId = GameData.blockRegistry.add(Id, name, block);
        GameData.itemRegistry.useSlot(blockId);
	}