new provideblock

ItemBackpack.java

    /**
     * Uses Botania's API to make the backpack able to provide blocks to items that need it.
     * @param player - the player
     * @param requestor - itemStack requesting items
     * @param stack - the stack to request items from (i.e. my backpack)
     * @param block - the block requested
     * @param meta - metadata of the block
     * @param doIt - if mana should be consumed (if the item uses mana)
     * @return - true if successful, false otherwise
     */
//    @Optional.Method(modid="botania")
    @Override
    public boolean provideBlock(EntityPlayer player, ItemStack requestor, ItemStack stack, Block block, int meta, boolean doIt) {

        //simulate inventory to see if it has items
        InventoryBackpack invBackpack = makeInv(IronBackpacks.proxy.getCurrBackpack(player), player);
        int amount = invBackpack.hasStackInInv(block, meta);

        if (amount > 0){
            return invBackpack.removeOneItem(block, meta); //returns true if it was removed
        }

        return false;
    }