//Set icon item
setIcon("minecraft:emerald")

//Set title String
setTitle("Weird Man give Shinies")

//Set description String
setDescription("Trade for an emerald with a villager")

//Set the parent advancement. The syntax is "modid:folder/path/to/the/advancement/then/filename"
setParent("triumph:example/root")

//Adds criteria named "traded" with the trigger type "minecraft:villager_trade". This function returns the criteria as an object
criteria = addCriteria("traded", "minecraft:villager_trade")

//Sets the required entity type for the criteria. This is the entity that the player must trade with. If I had implemented NBT, this could be used to set the villager type.
criteria.setEntityType("minecraft:villager")

//Sets the required item for the criteria. This is the item that must be traded for.
criteria.setItem("minecraft:emerald")
