IVanishable
Link to ivanishable
Used to denote items and blocks that can have the vanishing enchantment applied.
Importing the class
Link to importing-the-class
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 Copyimport crafttweaker.api.enchantment.vanishing.IVanishable;