//Set the icon item
setIcon(<minecraft:melon>)

//Set the title String
setTitle("Mmmmmmmmmm, melon")

//Set the description String
setDescription("Eat delicious melon")

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

//Set the position
setPos(11,41)

//Hide the connection lines, so I can have a pretty shape
hideLines()

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

//Sets the required item for the criteria. This is the item that needs to be consumed.
criteria.setItem(<minecraft:melon>)