It might be required for you to import the package if you encounter any issues (like casting an Array), so better be safe than sorry and add the import at the very top of the file.

ZenScript
 Copy
import crafttweaker.api.villager.trade.type.EmeraldForItems;

EmeraldForItems implements the following interfaces. That means all methods defined in these interfaces are also available in EmeraldForItems

• ItemListing

ZenScript
 Copy
new EmeraldForItems(item as ItemLike, cost as int, maxUses as int, villagerXp as int) as EmeraldForItems
new EmeraldForItems(<item:minecraft:diamond>, 1, 8, 2);

Parameter	Type	Description
Parameter item	Type ItemLike	Description The Item that is being given to the villager
Parameter cost	Type int	Description How many emeralds does this trade cost
Parameter maxUses	Type int	Description How many times can this trade be used
Parameter villagerXp	Type int	Description How much experience does this trade reward the villager