@Override // IInventory
 public void setInventorySlotContents(int slot, ItemStack stack) {
   log.debug("setInventorySlotContents", "slot", slot, "stack", stack);
   switch (slot) {
     case SLOT_IMPORT:
       if (stack == null || stack.stackSize == 0) return;
       _inventory.put(stack);
       markDirty();
       break;
     case SLOT_EXPORT:
       _inventory.setExport(stack);
       break;
     default:
       break;
   }
 }