Bukkit

5.1.0 API

• added: added the slime modifier value from 5.1.0 to HeadRollEvent, you can access this with the getSlimeModifier() method in a listener.  This will be 1.0 (no effect) for any non-slime entity.
• internal: an internal constructor was added with the new modifier, the pre-existing constructor was maintained to prevent breaking any project but the older one will set the slimemodifier to 1.0 (no effect).   In normal use, there is no reason you should use these constructors to make your own event.

Documentation: https://crashdemons.github.io/PlayerHeads/

Instructions on using as a maven dependency can be found on the 4.10.0 API page.