@Override // ISidedInventory
 public boolean canExtractItem(int slot, ItemStack stack, int side) {
   switch (slot) {
     case SLOT_IMPORT:
     default:
       return false;
     case SLOT_EXPORT:
       return ItemHelper.itemsIdentical(_inventory.getExport(), stack);
   }
 }
 @Override // IInventory
 public ItemStack getStackInSlot(int slot) {
   switch (slot) {
     case SLOT_IMPORT:
     default:
       return null;
     case SLOT_EXPORT:
       return _inventory.getExport();
   }
 }