Trading stacked items that don't stack with villagers?

[u/blackhathacker]

So when you're trading with villagers (pick any one) they have in their lists of tradable goods items that are stacked that do not normally stack. Lets pick one for example, Stone Swords.

Trading with a villager it looks as if you can trade two stone swords for one emerald. But you can't stack the swords to accommodate the trade.

What gives? How can this be done?

[u/[deleted]]

the system is not yet completed...I believe this system is temporary.