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
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import crafttweaker.api.villager.trade.type.EnchantedItemForEmeralds;

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

• ItemListing

ZenScript
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new EnchantedItemForEmeralds(item as ItemDefinition, baseEmeraldCost as int, maxUses as int, villagerXp as int) as EnchantedItemForEmeralds
new EnchantedItemForEmeralds(<item:minecraft:diamond_axe>, 5, 8, 2);

Parameter	Type	Description
Parameter item	Type ItemDefinition	Description The Item that is being sold by the villager
Parameter baseEmeraldCost	Type int	Description The base cost of the trade before any multipliers are applied
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

ZenScript
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new EnchantedItemForEmeralds(item as ItemDefinition, baseEmeraldCost as int, maxUses as int, villagerXp as int, priceMultiplier as float) as EnchantedItemForEmeralds
new EnchantedItemForEmeralds(<item:minecraft:diamond_axe>, 5, 8, 2, 0.05);

Parameter	Type	Description
Parameter item	Type ItemDefinition	Description The Item that is being sold by the villager
Parameter baseEmeraldCost	Type int	Description The base cost of the trade before any multipliers are applied
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
Parameter priceMultiplier	Type float	Description How much the price is affected by demand, Hero of the Village, and village reputation