Fireball
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.
import crafttweaker.api.entity.type.projectile.Fireball;Extending AbstractHurtingProjectile
Fireball extends AbstractHurtingProjectile. That means all methods available in AbstractHurtingProjectile are also available in Fireball
Implemented Interfaces
Fireball implements the following interfaces. That means all methods defined in these interfaces are also available in Fireball