How do I fix the "Failed to load dependency entity for procedure" for my procedures?

This is a bug of some sort recreate your procedure and try then 

I found what may be the issue, if you go into the code itself, you can see the dependencies, and sourceentity is not provided for some reason!

(I used the on entity death event, same arguments)

public void onEntityDeath(LivingDeathEvent event) {
        if (event != null && event.getEntity() != null) {
            Entity entity = event.getEntity();
            int i = (int) entity.posX;
            int j = (int) entity.posY;
            int k = (int) entity.posZ;
            World world = entity.world;
            java.util.HashMap<String, Object> dependencies = new java.util.HashMap<>();
            dependencies.put("x", i);
            dependencies.put("y", j);
            dependencies.put("z", k);
            dependencies.put("world", world);
            dependencies.put("entity", entity);
            dependencies.put("event", event);
            this.executeProcedure(dependencies);
        }
    } 

sourceentity is not provided, though here it is required:

if (dependencies.get("sourceentity") == null) {
            System.err.println("Failed to load dependency sourceentity for procedure BloodKill!");
            return;
        } 

This line of code seemed to help:

dependencies.put("sourceentity", event.getSource());

Nevermind, I can't find the variable to put into this dependency. The event.getSource() did not return an entity

the real fix is 

dependencies.put("sourceentity", event.getSource().getTrueSource());